【摘要】 铵载体是一类存在于细胞膜上分子量约为 48kDa的主动转运NH+4的载体。本文在简单介绍了铵载体的研究历史和铵载体与泌铵的相互关系后 ,阐述了在原核和真核生物中的铵载体基因的克隆及其基因表达调控的研究进展 ,探讨了铵载体存在的普遍性和它在氮代谢中的作用。更多还原

【Abstract】 Ammonium transporters are a kind of active ion carriers existing as a kind of transmembrane protein with proposed molecular weight of about 48 kDa. In the beginning of this article a brief introduction is given to research history of this transporter and its relationship with ammonium excretion, followed by the detailed description of the research progress of both prokaryotic and eukaryotic amtB gene cloning and its expression. Finally, the function of Amt in the nitrogen assimilation and the existence of Amt in all kinds of organisms are summarized.更多还原