Osteocalcin and matrix Gla protein, shortened to MGP, are both vitamin-K-dependent proteins. Vitamin K enables gamma-glutamyl carboxylase to convert selected glutamate residues into calcium-binding gamma-carboxyglutamate residues....

Vitamin K does not add calcium to tissue. Instead, it supports an enzyme that changes selected protein residues, creating Gla sites with a stronger ability to...