Hemoregulatory peptide 5b is a synthetic analog of granulocyte chalone which initially identified in extracts of rodent bone marrow and human leukocytes. Monomer inhibits both formations of GM-CFC colonies and cytotoxic drug-induced recruitment of murine
TC-SP 14, also known as compound 14, is a highly active and potent S1P1 agonist with oral bioavailability. It exhibits an EC50 value of 0.042 μM, indicating its strong binding affinity to the S1P1 receptor. Notably, its interaction with the S1P3 receptor is minimal, as evidenced by an EC50 value of 3.47 μM. TC-SP 14 demonstrates significant pharmacological effects, including a marked reduction in blood lymphocyte counts and the attenuation of delayed type hypersensitivity response to antigen challenge [1].
Peptide originally derived from SARS-CoV Spike (S) protein; corresponds to amino acid residues 668 to 679. Highly potent inhibitor of SARS-CoV S protein and ACE2 interaction (IC50 = 1.88 nM in biochemical assay). Inhibits interaction of SARS-CoV S protein and Vero E6 cells in vitro. Please note, this peptide displays 80% sequence identity to homologous site on SARS-CoV-2 S-protein (residues 689-697).