A cikin dabbobi masu shayarwa akwai nau'i biyu na sarkar haske na immunoglobulin, wanda ake kira lambda (λ) da kappa (κ). A sarkar haske yana da yankuna biyu masu biyo baya: yanki ɗaya na dindindin da yanki mai canzawa. Kusan tsawon sarkar haske shine 211 zuwa 217 amino acid. Kowane antibody yana ƙunshe da sarƙoƙi biyu masu haske waɗanda koyaushe iri ɗaya ne; nau'in sarkar haske guda ɗaya, κ ko λ, yana nan a kowane antibody a cikin dabbobi masu shayarwa. Sauran nau'ikan sarƙoƙi masu haske, kamar sarkar iota (ι), ana samun su a cikin wasu dabbobi masu ƙashin ƙugu kamar sharks (Chondrichthyes) da kifi mai ƙashi (Teleostei). Tambaya: Menene sunan kimiyya ga sharks?
Chondrichthyes