Abstract: Berninamycin has been separated into berninamycins A and B by countercurrent distribution and by high-pressure liquid chromatography. Acidic hydrolysis of berninamycin A gives berninamycinic acid and the novel amino acid@-hydroxyvaline, as well as threonine, ammonia, and pyruvic acid. Complete reduction of berninamycin A with sodium borohydride followed by acidic hydrolysis gives P-hydroxyvaline, threonine, butyrine, and ...