Figure 1. Typification of allele E of the CSN1S1 locus. The amplified fragments from exon 19 of αs-1 casein were separated on a 2% agarose gel. M corresponds to the molecular weight marker pBR322/MspI; it can be observed 2 homozygote individuals for allele E (662 bp); one heterozygotic individual for allele E (662 and 205 bp) and one homozygotic individual for non-E alleles (205 bp).