Main Reaction: O-Acetylhomoserine + Cysteine >> Cystathionine

Reference: PubMed ID: 17021879
Authors: Wada M, Takagi H
Title: Metabolic pathways and biotechnological production of L-cysteine.
Published: 2006 Nov

O-Acetylhomoserine + Cysteine --> Cystathionine