| abstract |
A process for the preparation of 5-hydroxy-L-tryptophan, comprising microbiologically hydroxylating a substrate selected from the group consisting of L-tryptophan, D,L-tryptophan and omega -N-acyl-L-tryptophan with a human-nonpathogenic microorganism selected from the group consisting of the families micrococcaceae, pseudomonadaceae, corynebacteriaceae, and bacillaceae, especially the specie Bacillus subtilis ATCC No. 21733. |