| Chain | GOid | namespace | contents |
| A | 0000160 | biological_process | phosphorelay signal transduction system |
| A | 0000166 | molecular_function | nucleotide binding |
| A | 0004673 | molecular_function | protein histidine kinase activity |
| A | 0005524 | molecular_function | ATP binding |
| A | 0006355 | biological_process | regulation of DNA-templated transcription |
| A | 0007165 | biological_process | signal transduction |
| A | 0009399 | biological_process | nitrogen fixation |
| A | 0016301 | molecular_function | kinase activity |
| A | 0016310 | biological_process | phosphorylation |
| A | 0016740 | molecular_function | transferase activity |
| A | 0016772 | molecular_function | transferase activity, transferring phosphorus-containing groups |
| B | 0000160 | biological_process | phosphorelay signal transduction system |
| B | 0000166 | molecular_function | nucleotide binding |
| B | 0004673 | molecular_function | protein histidine kinase activity |
| B | 0005524 | molecular_function | ATP binding |
| B | 0006355 | biological_process | regulation of DNA-templated transcription |
| B | 0007165 | biological_process | signal transduction |
| B | 0009399 | biological_process | nitrogen fixation |
| B | 0016301 | molecular_function | kinase activity |
| B | 0016310 | biological_process | phosphorylation |
| B | 0016740 | molecular_function | transferase activity |
| B | 0016772 | molecular_function | transferase activity, transferring phosphorus-containing groups |
| C | 0000160 | biological_process | phosphorelay signal transduction system |
| C | 0000166 | molecular_function | nucleotide binding |
| C | 0003677 | molecular_function | DNA binding |
| C | 0003700 | molecular_function | DNA-binding transcription factor activity |
| C | 0005524 | molecular_function | ATP binding |
| C | 0006351 | biological_process | DNA-templated transcription |
| C | 0006355 | biological_process | regulation of DNA-templated transcription |
| C | 0008134 | molecular_function | transcription factor binding |
| C | 0009399 | biological_process | nitrogen fixation |
| C | 0043565 | molecular_function | sequence-specific DNA binding |