Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Cystine knot
Introduction
A cysteine knot is a protein structural motif in which two disulfide bridges and sections of polypeptide that occur between them form a loop through which a third disulfide bond passes. It occurs in many proteins across many species and provides considerable structural stability.[1]