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A linear organic polymer consisting of a large number of amino-acid residues bonded together in a chain, forming part of (or the whole of) a protein molecule.
- ‘It is a basic protein with a single polypeptide chain and acts on cellular and model lipid membranes.’
- ‘They both develop random transient beta-strands across the whole polypeptide chain.’
- ‘The LDL receptor is a polypeptide of 839 amino acids that spans the plasma membrane.’
- ‘Unlike larger polypeptides and proteins, small nucleic acid duplexes and hairpins do not have a dense core to which this effect would apply.’
- ‘These enzymes break down proteins into polypeptides and then into amino acids, which are absorbed through the gut wall into the bloodstream.’
Early 20th century: from poly- ‘many’+ peptone + -ide.
We take a look at several popular, though confusing, punctuation marks.
From Afghanistan to Zimbabwe, discover surprising and intriguing language facts from around the globe.
The definitions of ‘buddy’ and ‘bro’ in the OED have recently been revised. We explore their history and increase in popularity.