we examined expression of cell growth-related genes ( core hl histones and c myc ) and genes related to osteoblast differentiation ( type i collagen , osteopontin and osteocalcin , an osteoblast-specific marker ) in calvarial bone from the 3 osteopetrotic mutations in the rat ( ia/ia , op/op and tl/tl ) and normal littermates .
C0007595
of cell growth
C0029419
osteocalcin