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Peptides are chains of two and up to 100 amino acids bonded by amide bonds between the carboxyl and amino groups of adjacent side chains. Peptides are key regulators of many biological functions including hormone release and many neurological processes.
Proteins are comprised of one or more peptide chains, typically folded into a globular or fibrous form in a biologically functional way. A proteinÆs function is determined by its amino acid composition and also by its structure. Proteins have many different functions in biology including molecular transport, catalysis, and cellular signaling. Proteins can also have structural functions in cells. These structural proteins are frequently found in connective tissues such as cartilage, and also in hair, nails and animal shells.
Alfa Aesar offers an extensive range of peptides. Many are useful for the study of neuroscience, signal transduction and metabolism. We also offer a number of protein reagents for life science research.