Aprotein is composed of one or more long unbranched chains called

A protein is composed of one or more long unbranched chains called polypeptide chains.

Proteins are large biomolecules that consist of one or more long chains of amino acid residues. That linear chain is called a polypeptide. Amino acid residues are bonded together by peptide bonds and the sequence of amino acid chain is coded by the nucleotide sequence of DNA.

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.