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