Table 1.

Genotype-specific affinity constant used to calculate the concentration of free 25(OH)D

rs7041rs4588VDBP phenotypeAffinity constant (×109 per mol/L)
TTCCGc1F homozygote11.2
GGCCGc1S homozygote6.0
TTAAGc2 homozygote3.6
TTACGc1F/Gc2 heterozygote7.4
TGCCGc1F/Gc1S heterozygote8.6
TGACGc1S/Gc2 heterozygote4.8