SEM) differs between mutant and nonmutant littermate flanks (p < 0.0005, paired t-test, n = 6 pairs). There is also (data not shown) a small increase in the proportion of total skin area occupied by the ventral cream-colored compartment, 47.9 % in mutant compared to 37.8% in nonmutant (p < 0.005, paired t-test, n = 6 pairs).
(D) On an ae/ae background, the extent of dorsal skin pigmentation is reduced in deH/deH neonates (P3.5).
(E) Hair length in a representative pair of 1.5-mo-old deH/deH and nonmutant littermates, averaged over three skin slices at different rostrocaudal levels, and plotted as a function of the absolute distance from middorsum