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It comes from human gastric juices and is considered a stable gastric pentadecapeptide for its ability to maintain stability for over 24 hours within the harsh environment of human gastric juice

It's a foundational principle for working with almost all research peptides

Through systematic fractionation of human albumin, Pickart and colleagues isolated a small peptide responsible for the difference, eventually identifying it as a three-amino-acid sequence glycine, histidine, and lysine with an unusually strong affinity for binding copper(II) ions

doi: 10.1007/s00277-002-0560-6

Several studies have shown that the HGF/c-MET pathway participates in the recruitment and increase of MDSCs through multiple ways, and then promotes tumor immune evasion