Enzymes: Vitamin C Prolyl Hydroxylase & Copper Lysyl Oxidase
Sources:
[1] Molecular Biology of THE CELL 2nd Ed. Alberts, Bray pgs 988-990
[2] Biochemistry 4th Ed. Voet & Voet 235, 236, 238
[3] Biochemistry 5th Ed. Lehninger pg 254
[4] Wikipedia Bone