67224-41-3

ACTH (4-11) is a peptide fragment of adrenocorticotropic hormone (ACTH; Item No. 24257), a peptide hormone found in the brain that is involved in the biological stress response. ACTH (4-11) induces differentiation of melanocytes when used at a concentration of 1,000 nM. It inhibits angiotensin converting enzyme (ACE) activity in homogenized canine lung with an IC₅₀ value of 24 μM. ACTH (4-11) has been used to determine substrate specificity of recombinant H. zea carboxypeptidase B enzyme (CPBHz).

ACTH (4-11), an adrenocorticotropin hormone fragment, possesses a weak α-melanocyte stimulating hormone (α-MSH) potency only at high doses (100 and 1000 nM).

[1] Hirobe T, et al. ACTH(4-12) is the minimal message sequence required to induce the differentiation of mouse epidermal melanocytes in serum-free primary culture. J Exp Zool. 2000 May 1;286(6):632-40. DOI:10.1002/(sici)1097-010x(20000501)286:63.0.co;2-4