| Chain | GOid | namespace | contents |
| A | 0003824 | molecular_function | catalytic activity |
| A | 0004124 | molecular_function | cysteine synthase activity |
| A | 0006535 | biological_process | obsolete L-cysteine biosynthetic process from L-serine |
| A | 0016740 | molecular_function | transferase activity |
| A | 0019344 | biological_process | L-cysteine biosynthetic process |
| A | 0044272 | biological_process | sulfur compound biosynthetic process |
| A | 0080146 | molecular_function | L-cysteine desulfhydrase activity |
| B | 0003824 | molecular_function | catalytic activity |
| B | 0004124 | molecular_function | cysteine synthase activity |
| B | 0006535 | biological_process | obsolete L-cysteine biosynthetic process from L-serine |
| B | 0016740 | molecular_function | transferase activity |
| B | 0019344 | biological_process | L-cysteine biosynthetic process |
| B | 0044272 | biological_process | sulfur compound biosynthetic process |
| B | 0080146 | molecular_function | L-cysteine desulfhydrase activity |