Back
HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2684Generated: October 25, 2026

L-(+)-Cysteine → Isopenicillin N

https://huagongshe.com/reaction/2684

Reaction equation

Participants

RoleNameHCIDCharge
ReactantL-(+)-CysteineHCID 5862—
ReactantL-ValineHCID 6287—
ReactantPenicillin G PotassiumHCID 23664709—
ProductIsopenicillin NHCID 440723—

Reaction Steps

The first two steps in the biosynthesis of penicillin in P. chrysogenum are the condensation of the three amino acids L-5-amino-5-carboxypentanoic acid (L-α-aminoadipic acid) (A), L-cysteine (C) and L-valine (V) into the tripeptide LLD-ACV, followed by cyclization of this tripeptide to form isopenicillin N. This compound contains the typical β-lactam structure.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS05731165
Source datasetuspto-grants-1998_03
ORD IDord-2c4f86a4ef96422c818776439d737e2a
Source noteuspto-grants-1998_03