FACTORS INFLUENCING THE ENZYMIC ACTIVITIES OF BACTERIA
Abstract
Receive: RSS Feeds, eTOCs, free email alerts (when new articles cite this article), more» Information about commercial reprint orders: http://mmbr.asm.org/site/misc/reprints.xhtml To subscribe to to another ASM Journal go to: http://journals.asm.org/site/subscriptions/ 1 From the Biochemical Laboratory, Cambridge University CONTENTS Variations due to chemical factors in the growth medium ........................... 1. Presence of the specific substrate ............................................ 2. Presence of substances other-than the specific substrate ...................... 3. Suboptimal supply of growth factors ......................................... Variations due to physical factors involved during growth ........................... 1. Oxygen tension ............................................... 2. The pH of the medium during growth ........................................ 3. Temperature during growth ............................................... Factors apparently related to the organism itself .................. .................. 1. Age of the culture ............................................... 2. Permeability of cell membrane .............................................. 3. Cell division as a factor in enzyme variation ................................. The preparation of active cell suspensions ........................................... Discussion ............................................... The study of the metabolism of bacteria differs from that of the animal tissue cell in that the physical and chemical conditions holding in the environment in which the bacterial cell is formed have to be taken into account. The animal tissue cell is formed and metabolizes in an environment which is stabilized within narrow limits compared with the wide