| Chain | GOid | namespace | contents |
| A | 0003824 | molecular_function | catalytic activity |
| A | 0004553 | molecular_function | hydrolase activity, hydrolyzing O-glycosyl compounds |
| A | 0004565 | molecular_function | beta-galactosidase activity |
| A | 0005975 | biological_process | carbohydrate metabolic process |
| A | 0005990 | biological_process | lactose catabolic process |
| A | 0009341 | cellular_component | beta-galactosidase complex |
| A | 0016787 | molecular_function | hydrolase activity |
| A | 0016798 | molecular_function | hydrolase activity, acting on glycosyl bonds |
| A | 0030246 | molecular_function | carbohydrate binding |
| B | 0003824 | molecular_function | catalytic activity |
| B | 0004553 | molecular_function | hydrolase activity, hydrolyzing O-glycosyl compounds |
| B | 0004565 | molecular_function | beta-galactosidase activity |
| B | 0005975 | biological_process | carbohydrate metabolic process |
| B | 0005990 | biological_process | lactose catabolic process |
| B | 0009341 | cellular_component | beta-galactosidase complex |
| B | 0016787 | molecular_function | hydrolase activity |
| B | 0016798 | molecular_function | hydrolase activity, acting on glycosyl bonds |
| B | 0030246 | molecular_function | carbohydrate binding |
| C | 0003824 | molecular_function | catalytic activity |
| C | 0004553 | molecular_function | hydrolase activity, hydrolyzing O-glycosyl compounds |
| C | 0004565 | molecular_function | beta-galactosidase activity |
| C | 0005975 | biological_process | carbohydrate metabolic process |
| C | 0005990 | biological_process | lactose catabolic process |
| C | 0009341 | cellular_component | beta-galactosidase complex |
| C | 0016787 | molecular_function | hydrolase activity |
| C | 0016798 | molecular_function | hydrolase activity, acting on glycosyl bonds |
| C | 0030246 | molecular_function | carbohydrate binding |
| D | 0003824 | molecular_function | catalytic activity |
| D | 0004553 | molecular_function | hydrolase activity, hydrolyzing O-glycosyl compounds |
| D | 0004565 | molecular_function | beta-galactosidase activity |
| D | 0005975 | biological_process | carbohydrate metabolic process |
| D | 0005990 | biological_process | lactose catabolic process |
| D | 0009341 | cellular_component | beta-galactosidase complex |
| D | 0016787 | molecular_function | hydrolase activity |
| D | 0016798 | molecular_function | hydrolase activity, acting on glycosyl bonds |
| D | 0030246 | molecular_function | carbohydrate binding |