The function of high-molecular-weight ribonucleic acid from rabbit reticulocytes in haemoglobin biosynthesis.

2. The glucosyl, maltosyl and lactosyl derivatives of 6-APA were prepared as their sodium salts and some of their properties examined. 3. These derivatives of 6-APA are stable to both staphylococcal and Bacillua cereus penicillinase, but are readily hydrolysed to the parent compounds by acid. 4. Compounds behaving like those prepared from 6-APA and sugars were identified in both the culture filtrates and the mycelium of a culture of Penicillium chry8ogenum grown under conditions in which it produced 6-APA.