Overall structure of the U11 snRNP
Resolution: 3.4 Å
EM Method: Single-particle
Fitted PDBs: 8r7n
Q-score: 0.306
Zhao J, Peter D, Brandina I, Liu X, Galej WP
Mol Cell (2025) 85 pp. 652- [ DOI: doi:10.1016/j.molcel.2024.12.017 Pubmed: 39809272 ]
- U11/u12 small nuclear ribonucleoprotein 48 kda protein (40 kDa, Protein from Homo sapiens)
- Programmed cell death protein 7 (54 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein e (10 kDa, Protein from Homo sapiens)
- Zinc finger matrin-type protein 5 (20 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein sm d3 (13 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein g (8 kDa, Protein from Homo sapiens)
- U11/u12 small nuclear ribonucleoprotein 25 kda protein (15 kDa, Protein from Homo sapiens)
- Overall structure of the apo-u11 snrnp (300 kDa, Complex from Homo sapiens)
- U11/u12 small nuclear ribonucleoprotein 35 kda protein (29 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein sm d1 (13 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein f (9 kDa, Protein from Homo sapiens)
- U11 snrna (43 kDa, RNA from Homo sapiens)
- Small nuclear ribonucleoprotein sm d2 (13 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein-associated proteins b and b' (24 kDa, Protein from Homo sapiens)
Overall structure of the substrate-bound U11 snRNP
Resolution: 3.5 Å
EM Method: Single-particle
Fitted PDBs: 9gbw
Q-score: 0.32
Zhao J, Peter D, Brandina I, Liu X, Galej WP
Mol Cell (2025) 85 pp. 652- [ DOI: doi:10.1016/j.molcel.2024.12.017 Pubmed: 39809272 ]
- U11/u12 small nuclear ribonucleoprotein 48 kda protein (40 kDa, Protein from Homo sapiens)
- Programmed cell death protein 7 (54 kDa, Protein from Homo sapiens)
- Overall structure of the substrate-bound u11 snrnp (400 kDa, Complex from Homo sapiens)
- Small nuclear ribonucleoprotein e (10 kDa, Protein from Homo sapiens)
- P120-5'ss (3 kDa, RNA from Homo sapiens)
- Zinc finger matrin-type protein 5 (20 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein sm d3 (13 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein g (8 kDa, Protein from Homo sapiens)
- U11/u12 small nuclear ribonucleoprotein 25 kda protein (15 kDa, Protein from Homo sapiens)
- U11/u12 small nuclear ribonucleoprotein 35 kda protein (29 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein sm d1 (13 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein f (9 kDa, Protein from Homo sapiens)
- U11 snrna (43 kDa, RNA from Homo sapiens)
- Small nuclear ribonucleoprotein sm d2 (13 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein-associated proteins b and b' (24 kDa, Protein from Homo sapiens)
3'-lobe of the substrate-bound U11 snRNP
Resolution: 3.2 Å
EM Method: Single-particle
Fitted PDBs: 9gc0
Q-score: 0.393
Zhao J, Peter D, Brandina I, Liu X, Galej WP
Mol Cell (2025) 85 pp. 652- [ DOI: doi:10.1016/j.molcel.2024.12.017 Pubmed: 39809272 ]
- U11/u12 small nuclear ribonucleoprotein 48 kda protein (40 kDa, Protein from Homo sapiens)
- Programmed cell death protein 7 (54 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein e (10 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein sm d3 (13 kDa, Protein from Homo sapiens)
- Zinc finger matrin-type protein 5 (20 kDa, Protein from Homo sapiens)
- 3'-lobe of the substrate-bound u11 snrnp (300 kDa, Complex from Homo sapiens)
- Small nuclear ribonucleoprotein g (8 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein sm d1 (13 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein f (9 kDa, Protein from Homo sapiens)
- U11 snrna (43 kDa, RNA from Homo sapiens)
- Small nuclear ribonucleoprotein sm d2 (13 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein-associated proteins b and b' (24 kDa, Protein from Homo sapiens)
Structure of the U11 snRNP C-lobe
Resolution: 3.0 Å
EM Method: Single-particle
Fitted PDBs: 9gcl
Q-score: 0.413
Zhao J, Peter D, Brandina I, Liu X, Galej WP
Mol Cell (2025) 85 pp. 652- [ DOI: doi:10.1016/j.molcel.2024.12.017 Pubmed: 39809272 ]
- U11/u12 small nuclear ribonucleoprotein 48 kda protein (40 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein e (10 kDa, Protein from Homo sapiens)
- Zinc finger matrin-type protein 5 (20 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein sm d3 (13 kDa, Protein from Homo sapiens)
- Structure of the apo-u11 snrnp 3-lobe (300 kDa, Complex from Homo sapiens)
- Small nuclear ribonucleoprotein g (8 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein sm d1 (13 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein f (9 kDa, Protein from Homo sapiens)
- U11 snrna (43 kDa, RNA from Homo sapiens)
- Small nuclear ribonucleoprotein sm d2 (13 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein-associated proteins b and b' (24 kDa, Protein from Homo sapiens)
The cryo-EM structure of human pre-C*-I complex
Resolution: 3.6 Å
EM Method: Single-particle
Fitted PDBs: 7w59
Q-score: 0.268
Zhan X, Lu Y, Zhang X, Yan C, Shi Y
Mol Cell (2022) 82 pp. 2769-2778.e4 [ Pubmed: 35705093 DOI: doi:10.1016/j.molcel.2022.05.021 ]
- U5 small nuclear ribonucleoprotein 40 kda protein (39 kDa, Protein from Homo sapiens)
- Psme3-interacting protein (28 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein e (10 kDa, Protein from Homo sapiens)
- Protein casc3 (76 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor syf2 (28 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor rbm22 (46 kDa, Protein from Homo sapiens)
- Pre-mrna-processing-splicing factor 8 (273 kDa, Protein from Homo sapiens)
- U2 snrna (60 kDa, RNA from Homo sapiens)
- Pre-mrna-processing factor 17 (65 kDa, Protein from Homo sapiens)
- Crooked neck-like protein 1 (100 kDa, Protein from Homo sapiens)
- Pre-mrna (14 kDa, RNA from unidentified adenovirus)
- Pre-mrna-splicing factor cwc22 homolog (105 kDa, Protein from Homo sapiens)
- U6 snrna (34 kDa, RNA from Homo sapiens)
- Guanosine-5'-triphosphate (523 Da, Ligand)
- Small nuclear ribonucleoprotein sm d3 (13 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein g (8 kDa, Protein from Homo sapiens)
- Atp-dependent rna helicase dhx8 (139 kDa, Protein from Homo sapiens)
- Adenosine-5'-triphosphate (507 Da, Ligand)
- Protein bud31 homolog (17 kDa, Protein from Homo sapiens)
- 116 kda u5 small nuclear ribonucleoprotein component (109 kDa, Protein from Homo sapiens)
- Pre-mrna (55 kDa, RNA from unidentified adenovirus)
- Small nuclear ribonucleoprotein sm d2 (13 kDa, Protein from Homo sapiens)
- Serine/arginine repetitive matrix protein 2 (300 kDa, Protein from Homo sapiens)
- Rna helicase aquarius (171 kDa, Protein from Homo sapiens)
- Rna-binding protein 8a (19 kDa, Protein from Homo sapiens)
- Human pre-c*-i complex (Complex from Homo sapiens)
- Peptidyl-prolyl cis-trans isomerase-like 1 (18 kDa, Protein from Homo sapiens)
- Snw domain-containing protein 1 (61 kDa, Protein from Homo sapiens)
- U5 snrna (37 kDa, RNA from Homo sapiens)
- U2 small nuclear ribonucleoprotein a' (28 kDa, Protein from Homo sapiens)
- U2 small nuclear ribonucleoprotein b'' (25 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein sm d1 (13 kDa, Protein from Homo sapiens)
- Protein mago nashi homolog (17 kDa, Protein from Homo sapiens)
- Magnesium ion (24 Da, Ligand)
- Small nuclear ribonucleoprotein-associated proteins b and b' (24 kDa, Protein from Homo sapiens)
- Inositol hexakisphosphate (660 Da, Ligand)
- Small nuclear ribonucleoprotein f (9 kDa, Protein from Homo sapiens)
- Zinc ion (65 Da, Ligand)
- Pleiotropic regulator 1 (57 kDa, Protein from Homo sapiens)
- Eukaryotic initiation factor 4a-iii (46 kDa, Protein from Homo sapiens)
- Cell division cycle 5-like protein (92 kDa, Protein from Homo sapiens)
- Pre-mrna-processing factor 19 (55 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor syf1 (100 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor spf27 (26 kDa, Protein from Homo sapiens)
- Peptidyl-prolyl cis-trans isomerase e (33 kDa, Protein from Homo sapiens)
- Spliceosome-associated protein cwc15 homolog (26 kDa, Protein from Homo sapiens)
The cryo-EM structure of human pre-C*-II complex
Resolution: 3.6 Å
EM Method: Single-particle
Fitted PDBs: 7w5a
Q-score: 0.269
Zhan X, Lu Y, Zhang X, Yan C, Shi Y
Mol Cell (2022) 82 pp. 2769-2778.e4 [ Pubmed: 35705093 DOI: doi:10.1016/j.molcel.2022.05.021 ]
- U5 small nuclear ribonucleoprotein 40 kda protein (39 kDa, Protein from Homo sapiens)
- Psme3-interacting protein (28 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein e (10 kDa, Protein from Homo sapiens)
- Protein casc3 (76 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor syf2 (28 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor rbm22 (46 kDa, Protein from Homo sapiens)
- Pre-mrna-processing-splicing factor 8 (273 kDa, Protein from Homo sapiens)
- Cactin (88 kDa, Protein from Homo sapiens)
- Human pre-c*-ii complex (Complex from Homo sapiens)
- U2 snrna (60 kDa, RNA from Homo sapiens)
- Pre-mrna (55 kDa, RNA from unidentified adenovirus)
- Prkr-interacting protein 1 (21 kDa, Protein from Homo sapiens)
- Pre-mrna-processing factor 17 (65 kDa, Protein from Homo sapiens)
- Crooked neck-like protein 1 (100 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor cwc22 homolog (105 kDa, Protein from Homo sapiens)
- U6 snrna (34 kDa, RNA from Homo sapiens)
- Guanosine-5'-triphosphate (523 Da, Ligand)
- Small nuclear ribonucleoprotein sm d3 (13 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein g (8 kDa, Protein from Homo sapiens)
- Atp-dependent rna helicase dhx8 (139 kDa, Protein from Homo sapiens)
- Adenosine-5'-triphosphate (507 Da, Ligand)
- Protein bud31 homolog (17 kDa, Protein from Homo sapiens)
- 116 kda u5 small nuclear ribonucleoprotein component (109 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein sm d2 (13 kDa, Protein from Homo sapiens)
- Serine/arginine repetitive matrix protein 2 (300 kDa, Protein from Homo sapiens)
- Rna helicase aquarius (171 kDa, Protein from Homo sapiens)
- Rna-binding protein 8a (19 kDa, Protein from Homo sapiens)
- U5 snrna (37 kDa, RNA from Homo sapiens)
- Peptidyl-prolyl cis-trans isomerase-like 1 (18 kDa, Protein from Homo sapiens)
- Snw domain-containing protein 1 (61 kDa, Protein from Homo sapiens)
- Protein fam32a (13 kDa, Protein from Homo sapiens)
- U2 small nuclear ribonucleoprotein a' (28 kDa, Protein from Homo sapiens)
- U2 small nuclear ribonucleoprotein b'' (25 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein sm d1 (13 kDa, Protein from Homo sapiens)
- Protein mago nashi homolog (17 kDa, Protein from Homo sapiens)
- Magnesium ion (24 Da, Ligand)
- Small nuclear ribonucleoprotein-associated proteins b and b' (24 kDa, Protein from Homo sapiens)
- Inositol hexakisphosphate (660 Da, Ligand)
- Small nuclear ribonucleoprotein f (9 kDa, Protein from Homo sapiens)
- Zinc ion (65 Da, Ligand)
- Pleiotropic regulator 1 (57 kDa, Protein from Homo sapiens)
- Eukaryotic initiation factor 4a-iii (46 kDa, Protein from Homo sapiens)
- Cell division cycle 5-like protein (92 kDa, Protein from Homo sapiens)
- Pre-mrna-processing factor 19 (55 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor syf1 (100 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor slu7 (68 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor spf27 (26 kDa, Protein from Homo sapiens)
- Peptidyl-prolyl cis-trans isomerase e (33 kDa, Protein from Homo sapiens)
- Pre-mrna (14 kDa, RNA from unidentified adenovirus)
- Spliceosome-associated protein cwc15 homolog (26 kDa, Protein from Homo sapiens)
The cryo-EM structure of human C* complex
Resolution: 4.3 Å
EM Method: Single-particle
Fitted PDBs: 7w5b
Q-score: 0.192
Zhan X, Lu Y, Zhang X, Yan C, Shi Y
Mol Cell (2022) 82 pp. 2769-2778.e4 [ Pubmed: 35705093 DOI: doi:10.1016/j.molcel.2022.05.021 ]
- U5 small nuclear ribonucleoprotein 40 kda protein (39 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein e (10 kDa, Protein from Homo sapiens)
- Protein casc3 (76 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor syf2 (28 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor rbm22 (46 kDa, Protein from Homo sapiens)
- Pre-mrna-processing-splicing factor 8 (273 kDa, Protein from Homo sapiens)
- Cactin (88 kDa, Protein from Homo sapiens)
- U2 snrna (60 kDa, RNA from Homo sapiens)
- Pre-mrna (55 kDa, RNA from unidentified adenovirus)
- U5 small nuclear ribonucleoprotein 200 kda helicase (244 kDa, Protein from Homo sapiens)
- Prkr-interacting protein 1 (21 kDa, Protein from Homo sapiens)
- Pre-mrna-processing factor 17 (65 kDa, Protein from Homo sapiens)
- Crooked neck-like protein 1 (100 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor cwc22 homolog (105 kDa, Protein from Homo sapiens)
- U6 snrna (34 kDa, RNA from Homo sapiens)
- Guanosine-5'-triphosphate (523 Da, Ligand)
- Small nuclear ribonucleoprotein sm d3 (13 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein g (8 kDa, Protein from Homo sapiens)
- Atp-dependent rna helicase dhx8 (139 kDa, Protein from Homo sapiens)
- Adenosine-5'-triphosphate (507 Da, Ligand)
- Protein bud31 homolog (17 kDa, Protein from Homo sapiens)
- 116 kda u5 small nuclear ribonucleoprotein component (109 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein sm d2 (13 kDa, Protein from Homo sapiens)
- Serine/arginine repetitive matrix protein 2 (300 kDa, Protein from Homo sapiens)
- Rna helicase aquarius (171 kDa, Protein from Homo sapiens)
- Rna-binding protein 8a (19 kDa, Protein from Homo sapiens)
- Human pre-c*-i complex (Complex from Homo sapiens)
- U5 snrna (37 kDa, RNA from Homo sapiens)
- Snw domain-containing protein 1 (61 kDa, Protein from Homo sapiens)
- Peptidyl-prolyl cis-trans isomerase-like 1 (18 kDa, Protein from Homo sapiens)
- Protein fam32a (13 kDa, Protein from Homo sapiens)
- U2 small nuclear ribonucleoprotein a' (28 kDa, Protein from Homo sapiens)
- U2 small nuclear ribonucleoprotein b'' (25 kDa, Protein from Homo sapiens)
- Small nuclear ribonucleoprotein sm d1 (13 kDa, Protein from Homo sapiens)
- Protein mago nashi homolog (17 kDa, Protein from Homo sapiens)
- Magnesium ion (24 Da, Ligand)
- Small nuclear ribonucleoprotein-associated proteins b and b' (24 kDa, Protein from Homo sapiens)
- Inositol hexakisphosphate (660 Da, Ligand)
- Small nuclear ribonucleoprotein f (9 kDa, Protein from Homo sapiens)
- Zinc ion (65 Da, Ligand)
- Pleiotropic regulator 1 (57 kDa, Protein from Homo sapiens)
- Eukaryotic initiation factor 4a-iii (46 kDa, Protein from Homo sapiens)
- Cell division cycle 5-like protein (92 kDa, Protein from Homo sapiens)
- Pre-mrna-processing factor 19 (55 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor syf1 (100 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor slu7 (68 kDa, Protein from Homo sapiens)
- Pre-mrna-splicing factor spf27 (26 kDa, Protein from Homo sapiens)
- Peptidyl-prolyl cis-trans isomerase e (33 kDa, Protein from Homo sapiens)
- Pre-mrna (14 kDa, RNA from unidentified adenovirus)
- Nf-kappa-b-activating protein (47 kDa, Protein from Homo sapiens)
- Spliceosome-associated protein cwc15 homolog (26 kDa, Protein from Homo sapiens)
Yeast C complex spliceosome at 2.8 Angstrom resolution with Prp18/Slu7 bound, composite map
Resolution: 2.8 Å
EM Method: Single-particle
Fitted PDBs: 7b9v
Q-score: 0.378
Wilkinson ME, Fica SM, Galej WP, Nagai K
Mol Cell (2021) 81 pp. 1439- [ Pubmed: 33705709 DOI: doi:10.1016/j.molcel.2021.02.021 ]
- Small nuclear ribonucleoprotein f (9 kDa, Protein from Saccharomyces cerevisiae)
- Pre-mrna-splicing factor slu7 (44 kDa, Protein from Saccharomyces cerevisiae)
- Pre-mrna-splicing factor 18 (28 kDa, Protein from Saccharomyces cerevisiae)
- 5' exon of ubc4 mrna (15 kDa, RNA from Saccharomyces cerevisiae)
- Yeast c complex spliceosome with prp18/slu7 bound (2 MDa, Complex from Saccharomyces cerevisiae)
- Syf1 isoform 1 (100 kDa, Protein from Saccharomyces cerevisiae)
- Pre-mrna-splicing factor slt11 (40 kDa, Protein from Saccharomyces cerevisiae)
- Unassigned structure (20 kDa, Protein from Saccharomyces cerevisiae)
- Ntc20 isoform 1 (15 kDa, Protein from Saccharomyces cerevisiae)
- U5 snrna (68 kDa, RNA from Saccharomyces cerevisiae)
- Cwc22 isoform 1 (67 kDa, Protein from Saccharomyces cerevisiae)
- Small nuclear ribonucleoprotein sm d3 (11 kDa, Protein from Saccharomyces cerevisiae)
- Small nuclear ribonucleoprotein g (8 kDa, Protein from Saccharomyces cerevisiae)
- U2 snrna (376 kDa, RNA from Saccharomyces cerevisiae)
- Potassium ion (39 Da, Ligand)
- U6 snrna (35 kDa, RNA from Saccharomyces cerevisiae)
- Pre-mrna-processing protein 45 (42 kDa, Protein from Saccharomyces cerevisiae)
- Guanosine-5'-triphosphate (523 Da, Ligand)
- Pre-mrna-splicing factor atp-dependent rna helicase prp16 (121 kDa, Protein from Saccharomyces cerevisiae)
- Branched intron and 3' exon of ubc4 pre-mrna (30 kDa, RNA from Saccharomyces cerevisiae)
- Hlj1_g0053790.mrna.1.cds.1 (27 kDa, Protein from Saccharomyces cerevisiae)
- Bj4_g0054360.mrna.1.cds.1 (50 kDa, Protein from Saccharomyces cerevisiae)
- Pre-mrna-splicing factor cwc21 (15 kDa, Protein from Saccharomyces cerevisiae)
- Pre-mrna-splicing helicase brr2 (246 kDa, Protein from Saccharomyces cerevisiae)
- Cdc40 isoform 1 (52 kDa, Protein from Saccharomyces cerevisiae)
- Pre-mrna-splicing factor cwc15 (19 kDa, Protein from Saccharomyces cerevisiae)
- Pre-mrna-processing factor 19 (56 kDa, Protein from Saccharomyces cerevisiae)
- D-chiro inositol hexakisphosphate (660 Da, Ligand)
- Small nuclear ribonucleoprotein-associated protein b (22 kDa, Protein from Saccharomyces cerevisiae)
- Pre-mrna-splicing factor isy1 (27 kDa, Protein from Saccharomyces cerevisiae)
- Clf1 isoform 1 (82 kDa, Protein from Saccharomyces cerevisiae)
- Bud31 isoform 1 (18 kDa, Protein from Saccharomyces cerevisiae)
- Y55_g0042700.mrna.1.cds.1 (67 kDa, Protein from Saccharomyces cerevisiae)
- Magnesium ion (24 Da, Ligand)
- Small nuclear ribonucleoprotein sm d1 (16 kDa, Protein from Saccharomyces cerevisiae)
- Pre-mrna-splicing factor cwc2 (38 kDa, Protein from Saccharomyces cerevisiae)
- Small nuclear ribonucleoprotein e (10 kDa, Protein from Saccharomyces cerevisiae)
- Pre-mrna-splicing factor 8 (279 kDa, Protein from Saccharomyces cerevisiae)
- Pre-mrna-splicing factor syf2 (24 kDa, Protein from Saccharomyces cerevisiae)
- Pre-mrna-splicing factor snu114 (114 kDa, Protein from Saccharomyces cerevisiae)
- Zinc ion (65 Da, Ligand)
- Bj4_g0027490.mrna.1.cds.1 (12 kDa, Protein from Saccharomyces cerevisiae)
- Pre-mrna-splicing factor cwc25 (20 kDa, Protein from Saccharomyces cerevisiae)
- Snt309 isoform 1 (20 kDa, Protein from Saccharomyces cerevisiae)
- Splicing factor yju2 (33 kDa, Protein from Saccharomyces cerevisiae)
- Small nuclear ribonucleoprotein sm d2 (12 kDa, Protein from Saccharomyces cerevisiae)