Protein hormones are fractionated and isolated from {TAIL ~ extracts} of pituitary glands or {HEAD ~ tissues} 
Protein hormones are fractionated and isolated from { TAIL ~ extracts } of pituitary glands or { HEAD ~ tissues }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD