Figure 1. Characterization of the UCP1 Locus in Pigs.

(A) Wild boar sow with striped piglets in their nest.

(B) Dotpath alignments of genomic UCP1 sequences from pigs, humans, and cattle. The approximate positions of the six exons in human UCP1 are indicated. Gap1 and Gap2 indicate two gaps in the alignment between the pig and human sequences.

(C) Rate of nonsynonymous and synonymous substitutions in pairwise comparisons of UCP1 sequences from humans, mice, cattle, and pigs. The data are based on sequences from exon 1, 2, and 6. B, Bos taurus; H, Homo sapiens; M, Mus musculus; and S, Sus scrofa.

(Photo: Anneli Andersson, Linköping University, Sweden)