... A-8010 GrazAustria. Received 28 October 1986, Available online 5 April 2001. Abstract. DN-Acetyl amino acid esters were obtained via enantioselective hydrolysis of their racemates by use of fermenting yeast. Evidence is given that proteinases are the enzymes involved. References. 1; BI Glänzer, K. Faber, H. Griengl; For part 1 see Tetrahedron Lett. (1986), p. 4293. ...