serum levels of osteocalcin [ oc ; bone gla protein ( bgp ) ] and bone alkaline phosphatase ( b-ap ) are both correlated to osteoblastic activity , which may be regulated by several hormones , including estrogen , 1,25-dihydroxyvitamin d3 [ 1,25- ( oh ) 2d3 ] , and pth .
C1412791
oc
C0029419
bone gla protein