KIGTROPIN Recombinant Human Growth Hormone for Injection Generic Name: Recombinant Human Growth Hormone INGREDIENTS: Origin of the Active Ingredient: KIGTROPIN is a Recombinants Human Growth Hormone. KIGTROPIN is produced by recombinant DNA technology in E.coli secretion expression system. KIGTROPIN has the same amino acid sequence with 191 residues as the native human growth hormone produced in the human body. CHARACTERS: White Lyophilized powder.