αs1-Casein 207 amino acids  (Type A) 199 amino acids (Type B) αs2-Casein 178 amino acids 207 amino acids (Type A) β-Casein 217 amino acids (Type A2) 209 amino acids (Type A1) k-Casein 162 amino acids 169 amino acids

Data from Kappeler et al. 1998 and Al Haj and Al Kanhal 2010

Table 1: Relative distribution of the main caseins in cow and camel milk.