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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 580779Generated: October 25, 2026

L-(+)-Cysteine → Isopenicillin N

https://huagongshe.com/reaction/580779

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-a-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 numberUS05919680
Source datasetuspto-grants-1999_07
ORD IDord-81df6512871c4469bffca3460128b7e0
Source noteuspto-grants-1999_07