major function of biotin is to serve as a prosthetic group in acetyl-CoA car- boxylase, the first enzyme of fatty acid synthesis, so it was hypothesized that the excretion might be related to an increased general permeability of the cell membrane, caused by an insufficiency of fatty acids. This notion appeared to be supported by the finding that other treatments affecting the integrity of the cell membrane – for example, adding to the medium a detergent, Tween 60, or a low concentration of β -lactam antibiotics (the latter treatment strains the cell membrane by weakening the peptidoglycan cell wall) or limiting the amount of exogenously fed oleic acid in unsaturated fatty acid auxotrophs – also led to glutamic acid production, even in the presence of excess biotin.
These observations were also of practical importance because they sug- gested ways to stimulate glutamic acid excretion while feeding the bacteria with inexpensive carbon sources (such as molasses) that happen to be rich
major function of biotin is to serve as a prosthetic group in acetyl-CoA car- boxylase, the first enzyme of fatty acid synthesis, so it was hypothesized that the excretion might be related to an increased general permeability of the cell membrane, caused by an insufficiency of fatty acids. This notion appeared to be supported by the finding that other treatments affecting the integrity of the cell membrane – for example, adding to the medium a detergent, Tween 60, or a low concentration of β -lactam antibiotics (the latter treatment strains the cell membrane by weakening the peptidoglycan cell wall) or limiting the amount of exogenously fed oleic acid in unsaturated fatty acid auxotrophs – also led to glutamic acid production, even in the presence of excess biotin.These observations were also of practical importance because they sug- gested ways to stimulate glutamic acid excretion while feeding the bacteria with inexpensive carbon sources (such as molasses) that happen to be rich
การแปล กรุณารอสักครู่..