idiochromatin

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idiochromatin

An obsolete term for an extranuclear part of chromatin which earlier workers thought played a role in reproduction.
 
Idiochromatin is one of many terms coined in the “light microscopy” era, during which analysis of cellular components was based strictly on morphology, a technique now regarded as primitive. Subsequent immune and molecular analysis of a previously described intracellular structure showed that earlier conclusions as to its nature or function were incorrect.
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