It is contemplated that growth factor protein product may be expressed using nucleotide sequences which differ in codon usage due to {HEAD ~ the degeneracies} of {TAIL ~ the genetic code} or allelic variations 
of
It is contemplated that growth factor protein product may be expressed using nucleotide sequences which differ in codon usage due to { HEAD ~ the degeneracies } of { TAIL ~ the genetic code } or allelic variations
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH