Peptide Science
Protein
Proteins are large, complex molecules composed of one or more chains of amino acids (typically >50) that perform essential functions in cells.
Detailed Explanation
Proteins are distinguished from peptides by their larger size (>50 amino acids) and more complex three-dimensional structures. They function as enzymes, structural components, signaling molecules, and receptors. Some research compounds blur the line — Follistatin-344 and ACE-031 are recombinant proteins/peptide complexes studied alongside traditional peptides.