... Hp 2b, corresponding to a1-b and a2-b polypep-tide chains, respectively, resulting in three main pheno-types: Hp 1-1, 2- 1 and 2- 2. All the phenotypes share the same b-chain containing 24 5 amino ... the N-terminus links with another (a-b)1, resulting in anHp dimer (a1-b) 2 , i.e. a Hp 1-1 molecule. In contrast, the a2-chain, containing a tandem repeat of residues 12 70 of a1 with 1 42 amino ... 2- 2. The most significant feature of the molecularstructure of human Hp 2- 2 is that it includes a tandemrepeat in the a2-chain. To determine whether this isalso true in deer Hp, we cloned the...