Fig. 1
Utilization of EP powder for the ilamycins production in S. atratus SCSIO ZH16 ΔR. A Yield of ilamycins in media with different complex nitrogen sources. 1, Angel yeast extract powder; 2, acid-hydrolyzed casein; 3, tryptone; 4, corn steep liquor; 5, fish peptone; 6, bacterial peptone; 7, OXOID yeast extract; 8, yeast extract paste; 9, polypeptone; 10, peptone; 11, malt extract; 12, beef extract; 13, Enteromorpha prolifera; 14, bean flour; 15, soybean powder. B Effect of different combinations of carbon and nitrogen sources on the yield of ilamycins. 1, soluble starch; 2, soybean powder; 3, EP powder, ‘(Acid)’ means after acid hydrolysis; 4, corn steep liquor, NaNO3 and (NH4)2SO4. Error bars represent the standard deviations from three independent biological replicates. **: P < 0.01 (Student’s t test). C Weight ratio and D molality of N, C, H in EP powder