Biopolymers consisting of amino acids that fold into 3D shapes and perform a large number of functions in living organisms.
Proteins consist of one or more large amino acid residues and perform a vast array of functions in living organisms. Questions may need to draw on alternative related tags, such as molecular-biology, cell-biology, amino-acids and proteomics.
Additional, more-precise tags exist for proteins and should be additionally used as appropriate: protein-structure protein-binding protein-folding protein-interaction protein-expression protein-evolution protein-engineering protein-identification