| Abstract: | An albino mutant was isolated after treating Monascus araneosus AHU9087 with N-methyl-N -nitro-N-nitrosoguanidine. All other physiological and biochemical characteristics were retained. The mutant did not produce any pigment but produced L-malic acid at 28 g/l, compared with 20 g/l by the parent strain, in media containing 10% (w/v) glucose after incubation under aerobic conditions for 5 days at 37°C.S. Lumyong is with the Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50002, Thailand. F. Tomita is with the Laboratory of Applied Microbiology, Faculty of Agriculture, Hokkaido University, Sapporo 060, Japan. |
