These include succinic acid and glutaric acids . 琥珀酸和丁二酸是属于这类酸。
2.
The feeding of glutamic acid , glutamine and a - keto - glutaric acid respectively showed that glutamic acid and glutamine had no obvious effects on cell growth , but stimulated apramycin production greatly . with the same concentration of amino acids supplemented , glutamine showed a stronger stimulation effect than glutamic acid , while a - keto - glutaric acid showed a repression effect on apramycin production . it could be deduced from above results that glutamine possibly is the donor of nitrogen element for the biosynthesis of apramycin Glu 、 gln及?酮戊二酸添加实验结果表明glu 、 gln对菌体的生长无明显的影响，但能强烈促进安普霉素的生物合成，且相同浓度条件下gln的促进作用明显高于glu ，而?酮戊二酸则对安普霉素的生物合成有抑制作用。
