Humulin R 10 ml | U-100 InsulinHumulin R U 100 is a polypeptide hormone structurally identical to human insulin synthesized through rDNA technology in a special non disease producing laboratory strain of Escherichia coli bacteria. Humulin R (insulin human recombinant) U 100 has the empirical formula C257H383N65O77S6 and a molecular weight of 5808. Humulin R (insulin human recombinant) U 100 is a sterile, clear, aqueous, and colorless solution that contains human insulin (rDNA