Arabidopsis thaliana (At)

1. Small nuclear Ribonucleoprotein (snRNP)

1.1 Sm core proteins

1.2 U1 snRNP specific proteins

1.3 17S U2 snRNP specific proteins

1.4 U5 snRNP specific proteins

1.5 U4/U6 snRNP specific proteins

1.6 Tri-snRNP specific proteins (U4/U6.U5)

1.7 18s U11/U2 snRNP specfic proteins

2. Splicing factors

2.1 Splice site selection

2.2 SR protein

2.3 17S U2 associated proteins

2.4 35S U5 associated proteins

2.5 Proteins specific for BDU1 complex

2.6 Exon junction complex (EJC) proteins

2.7 Second step splicing factors

2.8 Other known splicing factors

3. Splicing regulation

3.1 SR protein Kinase

3.2 Glycine-Rich RNA binding protein

3.3 hnRNP A/B family

3.4 Other hnRNP proteins (with animal homologs)

3.5 Other plant hnRNPs

4. Novel spliceosome proteins

4.1 Proteins involved in other processes

4.2 Poly A binding protein

4.3 DEAD/H box helicase

4.4 cis-trans prolyl isomerases

4.5 Related to spliceosome

5. Possible splicing related proteins

5.1 Splice factor like

5.2 Nucleotide Binding proteins

5.3 Possible multiple function proteins

5.4 Glycine Rich protein

6. Other familiy

6.0 new clusters