Nomenclature	Adenosine deaminase	Adenosine kinase	Ecto-5′-Nucleotidase	S-Adenosylhomocysteine hydrolase
Common abbreviation	ADA	ADK	NT5E	SAHH
HGNC, UniProt	ADA, P00813	ADK, P55263	NT5E, P21589	AHCY, P23526
EC number	3.5.4.4	2.7.1.20	3.1.3.5	3.3.1.1
Rank order of affinity	2'-deoxyadenosine > adenosine	adenosine	AMP, 5′-GMP, 5′-IMP, 5′-UMP > 5′-dAMP, 5′-dGMP	S-adenosylhomocysteine
Products	2'-deoxyinosine, inosine	AMP	adenosine, guanine, inosine, uridine	adenosine
Selective inhibitors (pIC50)	EHNA (pKi 8.8) 8, pentostatin (10.8) 8	A134974 (10.2) 14, ABT702 (8.8) 11	αβ-methyleneADP (8.7) 9	3-deazaadenosine (8.5) 10