:Beta-Ala-His dipeptidase

{{Short description|Enzyme}}

{{Infobox enzyme

| Name = Beta-Ala-His dipeptidase

| EC_number = 3.4.13.20

| CAS_number = 525589-43-9

| GO_code =

| image =

| width =

| caption =

}}

Beta-Ala-His dipeptidase ({{EC number|3.4.13.20}}, serum carnosinase) is an enzyme.{{cite journal | vauthors = Lenney JF, George RP, Weiss AM, Kucera CM, Chan PW, Rinzler GS | title = Human serum carnosinase: characterization, distinction from cellular carnosinase, and activation by cadmium | journal = Clinica Chimica Acta; International Journal of Clinical Chemistry | volume = 123 | issue = 3 | pages = 221–31 | date = August 1982 | pmid = 7116644 | doi = 10.1016/0009-8981(82)90166-8 }}{{cite journal | vauthors = Jackson MC, Kucera CM, Lenney JF | title = Purification and properties of human serum carnosinase | journal = Clinica Chimica Acta; International Journal of Clinical Chemistry | volume = 196 | issue = 2-3 | pages = 193–205 | date = February 1991 | pmid = 1903095 | doi = 10.1016/0009-8981(91)90073-L }} This enzyme catalyses the following chemical reaction

: Preferential hydrolysis of the beta-Ala!His dipeptide (carnosine), and also anserine, Xaa!His dipeptides and other dipeptides including homocarnosine

This enzyme is present in the serum of humans and higher primates.