| Modification Notes |
APOBEC3A (apolipoprotein B mRNA editing enzyme, catalytic polypeptide-like 3A), also known as ARP3 or PHRBN is a 199 amino acid protein that belongs to the cytidine deaminase family. Expressed in keratinocytes, as well as in peripherical leukocytes, APOBEC3A may be implicated in cell growth and cell cycle control. The gene encoding APOBEC3A is one of seven related genes which map to a cluster on chromosome 22 and are thought to play a role in tumor transformation and metastasis, as well as in host-associated antiviral activity. APOBEC3B (apolipoprotein B mRNA editing enzyme, catalytic polypeptide-like 3B), a 382 amino acid protein that is expressed in spleen, testis, ovary and heart, is also encoded by a gene that maps to the oncogenic cluster on chromosome 22. APOBEC3B uses zinc to catalyze reactions that may play important roles in cell growth and development. |