They release mercaptoacylamino acids which are already proved to be efficacious by enzymatic and chemical cleavage of disulfide bond and by {TAIL ~ enzymatic hydrolysis} of their esters or amides when administered to {HEAD ~ man} and animal 
They release mercaptoacylamino acids which are already proved to be efficacious by enzymatic and chemical cleavage of disulfide bond and by { TAIL ~ enzymatic hydrolysis } of their esters or amides when administered to { HEAD ~ man } and animal
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH