耐酸瘤胃细菌的细胞内pH值
Intracellular pH of acid-tolerant ruminal bacteria.
作者信息
Russell J B
机构信息
Agricultural Research Service, Cornell University, Ithaca, New York 14853.
出版信息
Appl Environ Microbiol. 1991 Nov;57(11):3383-4. doi: 10.1128/aem.57.11.3383-3384.1991.
Abstract
Acid-tolerant ruminal bacteria (Bacteroides ruminicola B1(4), Selenomonas ruminantium HD4, Streptococcus bovis JB1, Megasphaera elsdenii B159, and strain F) allowed their intracellular pH to decline as a function of extracellular pH and did not generate a large pH gradient across the cell membrane until the extracellular pH was low (less than 5.2). This decline in intracellular pH prevented an accumulation of volatile fatty acid anions inside the cells.
摘要
耐酸瘤胃细菌（栖瘤胃拟杆菌B1(4)、反刍月形单胞菌HD4、牛链球菌JB1、埃氏巨型球菌B159和菌株F）使其细胞内pH值随细胞外pH值下降，并且直到细胞外pH值较低（低于5.2）时才在细胞膜上产生较大的pH梯度。细胞内pH值的这种下降阻止了挥发性脂肪酸阴离子在细胞内的积累。
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