In general, recombinant techniques involve isolating the genes responsible for coding growth factor, cloning {HEAD ~ the gene} in suitable vectors and {TAIL ~ cell types}, modifying the gene if necessary to encode a desired variant, and expressing the gene in order to produce the growth factor protein product 
In general , recombinant techniques involve isolating the genes responsible for coding growth factor , cloning { HEAD ~ the gene } in suitable vectors and { TAIL ~ cell types } , modifying the gene if necessary to encode a desired variant , and expressing the gene in order to produce the growth factor protein product
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH