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