[Vitamin D-binding protein in human plasma. Analysis of genetic variation].

The vitamin-D-binding protein (DBP) also known as group-specific component (GC) is described. This transport protein for vitamin D and its metabolic derivatives has genetic variants which are disclosed by electrophoretic procedures or by isoelectric focusing. Three common and one hundred rare alleles are known. The biochemical, molecular and population genetics are briefly outlined as an example of inherited variability in man.