| Chain | GOid | namespace | contents |
| A | 0000398 | biological_process | mRNA splicing, via spliceosome |
| A | 0000492 | biological_process | box C/D snoRNP assembly |
| A | 0001651 | cellular_component | dense fibrillar component |
| A | 0003723 | molecular_function | RNA binding |
| A | 0005515 | molecular_function | protein binding |
| A | 0005634 | cellular_component | nucleus |
| A | 0005654 | cellular_component | nucleoplasm |
| A | 0005681 | cellular_component | spliceosomal complex |
| A | 0005690 | cellular_component | U4atac snRNP |
| A | 0005730 | cellular_component | nucleolus |
| A | 0006397 | biological_process | mRNA processing |
| A | 0007338 | biological_process | single fertilization |
| A | 0008380 | biological_process | RNA splicing |
| A | 0030490 | biological_process | maturation of SSU-rRNA |
| A | 0030515 | molecular_function | snoRNA binding |
| A | 0030621 | molecular_function | U4 snRNA binding |
| A | 0030622 | molecular_function | U4atac snRNA binding |
| A | 0031428 | cellular_component | box C/D methylation guide snoRNP complex |
| A | 0032040 | cellular_component | small-subunit processome |
| A | 0032991 | cellular_component | protein-containing complex |
| A | 0034511 | molecular_function | U3 snoRNA binding |
| A | 0034512 | molecular_function | box C/D sno(s)RNA binding |
| A | 0042254 | biological_process | ribosome biogenesis |
| A | 0042274 | biological_process | ribosomal small subunit biogenesis |
| A | 0046540 | cellular_component | U4/U6 x U5 tri-snRNP complex |
| A | 0051117 | molecular_function | ATPase binding |
| A | 0071005 | cellular_component | U2-type precatalytic spliceosome |
| A | 0071011 | cellular_component | precatalytic spliceosome |
| A | 1990904 | cellular_component | ribonucleoprotein complex |
