变形链球菌族（MS）是目前公认的致龋菌，其中与人类龋病发生关系密切的是变形链球菌和茸毛链球菌。
Mutans streptococci (MS) are the primary cariogenic agents, and Streptococcus mutans and Streptococcus sobrinus are believed to have the closest relationship with human caries.
本文以大肠杆菌为参照，对变形链球菌和血链球菌ATP酶的基因结构进行比较，探讨口腔致龋菌的质子移位膜ATP酶的结构特性。
In order to understand the genetic structure of F-ATPase of S. matans, we discuss the structure of F-ATPase of E. coli, S. matans and S. sanguis.
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