Keywords: Reaction - cholecalciferol to calcidiol.png cholecalciferol 25-hydroxylase a step in the biosynthesis of the active form of vitamin D<sub>3</sub> File Reaction-VitaminiD3-Calcitriol png File Reaction-VitaminiD3-Calcitriol png User Jag123 derivative work Robert Allen <span class signature-talk >talk</span> 21 33 1 August 2010 UTC 2010-08-01 Cholecalciferol |