The first human hormone produced by recombinant DNA technology is Insulin, Progesterone, Estrogen, or Thyroxin?

Developed by Genentech, the first American biotechnology company, Humulin was licensed to Eli Lilly and became the first marketable product created through recombinant DNA technology. The first genetically engineered, synthetic “human” insulin was produced in 1978 using E. coli bacteria to produce the insulin. So, the correct answer is 'Insulin'