Báo cáo Y học: Human bile salt-stimulated lipase has a high frequency of size variation due to a hypervariable region in exon 11

The apparent molecular mass of human milk bile salt-stimulated lipase (BSSL) varies between mothers. The molecular basis for this is unknown, but indirect evidence has suggested the di€erences to reside in a region of repeats located in the C-terminal part of the protein. We here report that a polymorphism within exon 11 of the BSSLgene is the explanation for the molecular variants of BSSL found in milk.