Process for preparing an n-guanylamino acid

Abstract

The present invention relates to a process for preparing an N-guanylamino acid, e.g., GAA, comprising the steps of a) providing a liquid and/or solid mixture comprising an N-guanylamino acid, e.g., GAA, biomass and/or DNA, b) treating the mixture of step a) with an acidic solution and/or acidic agent, and c) isolating the N-guanylamino acid, e.g., GAA, from the mixture obtained in step b), characterized in that the step b) is performed at a pH lower than the pKa of the N-guanylaminoacetic acid of the mixture provided in step a), measured by means of a pH-electrode.

Dependencies are inferred from the claim text.