Main Reaction: L-Tyrosine + L-Phenylalanine + Erythrose-4-phosphate + L-Tryptophan >> deoxy-D-arabinohepturosonate-7-phosphate

Reference: PubMed ID: 11676013
Authors: Tsukamoto Y, Kasai M, Kakuda H
Title: Construction of a Bacillus subtilis (natto) with high productivity of vitamin K2 (menaquinone-7) by analog resistance.
Published: 2001 Sep

L-Tyrosine + L-Phenylalanine + Erythrose-4-phosphate + L-Tryptophan --> deoxy-D-arabinohepturosonate-7-phosphate