What Are Some Other Commercial Uses of Genetic Engineering?
Using the same approach as in the insulin example, researchers found and transferred a copy of the gene for human growth hormone (HGH) to bacteria. The bacteria can produce large amounts of HGH, which can be purified and used to treat certain kinds of human dwarfism.
To increase milk production, other researchers transferred a copy of the gene for bovine growth hormone/bovine somatotropin (rBGH/rBST) to another strain of bacteria. And a copy of the gene for chymosin - a protein enzyme from calf stomachs used for cheese-making - was transferred into yet another strain of bacteria.
Four different strains of lab-grown bacteria and one strain of yeast are now used commercially to produce human insulin, human growth hormone, bovine growth hormone and chymosin.