Khramov V A, Lempert B A
Zh Mikrobiol Epidemiol Immunobiol. 1982 Jul(7):50-2.
Nine streptococcal strains belonging to different serological groups (A, B, C, D) were shown to synthesize carbamoyl phosphate from ammonium hydrocarbonate and ATP. The reaction was catalyzed by carbamate kinase (EC 2.7.2.2). The speed of the reaction was evaluated according to the increase of the content of citrullin (the combination of carbamate kinase and ornithine transcarbamoylase). The representatives of different serological groups were found to have quantitative differences in carbamate kinase activity: the highest specific activity (13 nmol of citrullin per minute in 1 mg of dried microbial biomass) was detected in group A streptococci, while group D streptococci showed the lowest specific activity (0.5 nmol).
九株属于不同血清学组（A、B、C、D）的链球菌菌株被证明能从碳酸氢铵和ATP合成氨基甲酰磷酸。该反应由氨基甲酸激酶（EC 2.7.2.2）催化。根据瓜氨酸含量的增加（氨基甲酸激酶和鸟氨酸转氨甲酰酶的结合）来评估反应速度。发现不同血清学组的代表在氨基甲酸激酶活性上存在定量差异：A组链球菌中检测到最高的比活性（每毫克干燥微生物生物质每分钟13 nmol瓜氨酸），而D组链球菌的比活性最低（0.5 nmol）。
