Inclusion group systems and cis-trans effects in responses controlled by the two complementing Ir-GLphi genes

The immune responses to the random linear terpolymers of L-amino acids, poly-(glu57, lys38, tyr5), poly-(glu51, lys34, tyr15,), and poly-(glu53, lys36, phe11) are each controlled by two dominant H-linked Ir genes. The immune responses to these three related terpolymers demonstrate different H-2 distributions, however, the H-2 patterns are part of a single inclusion group system. The alpha- and beta-genes are dominant; however, most effective gene interactions occur when the two genes are in the cis configuration. The potential significance of this cis-trans effect is discussed.