exotoxin

exotoxin
exotoxic, adj.
/ek'soh tok"sin/, n. Biochem.
a soluble toxin excreted by a microorganism. Cf. endotoxin.
[1915-20; EXO- + TOXIN]

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      a poisonous substance secreted by certain bacteria. In their purest form they are the most potent poisons known and are the active agents in diphtheria, tetanus, and botulism. The term is now sometimes restricted to poisonous proteins that are antigenic—i.e., that stimulate the formation of antibodies—and formed by gram-positive bacteria. Compare endotoxin.

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Universalium. 2010.

Look at other dictionaries:

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  • exotoxin — exotoxin. См. экзотоксин. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

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  • exotoxin — A specific, soluble, antigenic, usually heat labile, injurious substance elaborated by certain Gram positive or Gram negative bacteria; it is formed within the cell, but is released into the environment where it is rapidly active in extremely… …   Medical dictionary

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  • exotoxin — noun Etymology: International Scientific Vocabulary Date: 1920 a soluble poisonous substance produced during growth of a microorganism and released into the surrounding medium …   New Collegiate Dictionary

  • exotoxin — (ek so tok sin) A heat labile, toxic protein produced by a bacterium as a result of its normal metabolism or because of the acquisition of a plasmid or prophage that redirects its metabolism. It is usually released into the bacterium s… …   Dictionary of microbiology

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