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通过重组DNA技术,从农抗5102产生菌10-22菌株中得到1株工程菌株WH-1,它的培养特征与出发菌株10-22有明显差别,前者气生菌丝白色,不吸水,基内菌丝浅黄色,可溶性色素淡黄;后者气生菌丝深灰,在大多数培养基均能吸水,基内菌丝暗柠檬色,可溶性色素淡褐。两者在28℃和37℃均可良好生长。菌株WH-1能产生菌株10-22所产生的3种5102抗生素,而且活性均更强,尤其是5102-Ⅰ几乎要高出10倍。菌株WH-1尚能产生菌株10-22不产生的1种活性物质(5102-Ⅳ)。该活性物质只能在琼脂培养基上产生,却不能在液体培养基中得到重复
One recombinant strain WH-1 was obtained from Agrobacterium tumefaciens strain 10-22 by recombinant DNA technology. The characteristics of the strain WH-1 were different from that of the original strain 10-22. The former had a white, non-hygroscopic, The mycelium light yellow, soluble pigment light yellow; the latter aerial mycelium dark gray, in most media can absorb water, the substrate mycelium dark lemon, soluble pigment light brown. Both developed well at 28 ° C and 37 ° C. Strain WH-1 produced 3 kinds of 5102 antibiotics produced by strain 10-22, and its activity was even stronger. Especially, 5102-I was almost 10 times higher. Strain WH-1 was still able to produce one active substance (5102-IV) that strain 10-22 did not produce. The active substance can only be produced on agar but can not be duplicated in liquid medium