Skip to Content

pyrrole nucleus


Definition: of porphyrins, a cyclic tetrapyrrole; four pyrrole groups joined into an anular structure by way of –CH= (methylidyne) bridges between the a (2) position of one pyrrole and the a' (5) position of another pyrrole, the fourth pyrrole being joined to the first.

See Also: porphin, porphyrin

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.