Somatropin is recombinant human growth hormone (HGH): a 191 amino acid single chain protein with two disulfide bonds, identical in sequence to the growth hormone the pituitary secretes. Preclinical research uses it as the reference ligand for the growth hormone receptor, examining receptor dimerization, JAK2 and STAT5 signaling and IGF-1 output in cell and animal models.
Core Research Peptides supplies it as 12IU of lyophilized powder in a sealed vial under SKU CRP-HGH-12, at 99% purity. It reconstitutes in bacteriostatic water. Store at 2-8°C. Do not freeze.

