Most of the bacterial species found in the mouth belong(属于) to microbial(微生物的) communities, called biofilms, a feature(特色) of which is inter-bacterial communication. Cell-cell contact is mediated(调解) by specific(特殊的) protein(蛋白质) adhesins and often, as in the case of inter-species aggregation(聚合), by complementary(补足的) polysaccharide(多糖) receptors(受体).
大多数口腔内细菌属于微生物社区，称为细菌膜。细菌膜特点是内部细菌交流。
细菌交流依靠特殊粘连的蛋白质，多糖受体和信号传递分子。
信号传递分子分为两类：种内和种外
种外：4, 5-dihydroxy-2, 3-pentanedione (DPD) or Autoinducer-2 (Al-2)
Another method of communication involves(包含) cell-cell signalling(信号传输法) molecules(分子), which are of two classes: those used for intra-species种内 and those used for inter-species种外 signalling. An example of intra-species communication is quorum sensing. Oral bacteria have been shown to produce small peptides(缩氨酸), such as competence(能力) stimulating(刺激) peptides, which can help promote(促进) single-species biofilm(生物膜) formation(形成). A common form of inter-species signalling is mediated by 4, 5-dihydroxy-2, 3-pentanedione (DPD) or Autoinducer-2 (Al-2).
原文：http://www.cnblogs.com/biopy/p/4300342.html