| GO | Name |
| GO:0004586 | ornithine decarboxylase activity |
| GO:0005634 | nucleus |
| GO:0005737 | cytoplasm |
| GO:0005829 | cytosol |
| GO:0006521 | regulation of cellular amino acid metabolic process |
| GO:0033387 | putrescine biosynthetic process from ornithine |
| GO:0042177 | negative regulation of protein catabolic process |
| GO:0042978 | ornithine decarboxylase activator activity |
| GO:1902269 | positive regulation of polyamine transmembrane transport |