the possibility that the alpha and beta chains of each heterodimer established their interchain links within a labile precursor protein in which alpha and beta segments were fused was considered but discounted by the finding that in mice heterozygous for both ly-2 and ly-3 loci , the ly-2 product of one chromosome was not exclusively joined to ly-3 structures coded by the same chromosome .
C1708726
loci
C0008633
chromosome