{HEAD ~ The protein} is produced by {TAIL ~ culture} of Trichoderma virens, and may be subsequently recovered from the culture medium and purified 
is produced by
{ HEAD ~ The protein } is produced by { TAIL ~ culture } of Trichoderma virens , and may be subsequently recovered from the culture medium and purified
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH