Streptococcus faecalis calcium efflux

Microbial cells maintain low internal [Ca2+] levels through the operation of several types of highly active and specific efflux processes.180,184 Efflux of Ca2+ can only be studied with difficulty in whole cells, partly because of complications resulting from the binding of Ca2+ to the cell walls. Nevertheless, the presence of active mechanisms for the efflux of calcium are shown by the fact that extreme temperatures or inhibitors result in increased levels of intracellular calcium. Efflux of Ca2+ has been demonstrated for B. megaterium, while ATP-linked efflux of Ca2+ has been demonstrated for Streptococcus faecalis.lss... 

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