An initial attempt of protection by acylation of sulfhydryl group resulted in maintaining {HEAD ~ duration} of {TAIL ~ the activity} to some extent 
An initial attempt of protection by acylation of sulfhydryl group resulted in maintaining { HEAD ~ duration } of { TAIL ~ the activity } to some extent
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH