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