Birman

Agouti

The agouti signaling protein interacts with the melanocortin 1 receptor to switch between black and red pigments, creating a banding pattern in individual hairs. Mutations in the agouti signaling protein gene (ASIP) prevent this switch from occurring, resulting in hairs of uniform color.

AB Blood Group in Domestic Cat Breeds

The AB system is the major blood group system in domestic cats. The common blood types are A and B, and a third rare type "AB" is also known. This test detects the known genetic variants that produce B and AB blood types. When these variants are not detected, the cat is likely to have blood type A.

Albino

The feline albino mutation is a rare mutation that produces a white coat with blue eyes, and is recessive to the sepia and Siamese mutations.