Word Helper: An Associative Language Search Engine

What Google Knows

Toll-like receptors are a class of proteins that play a key role in the innate immune system. They are single-spanning receptors usually expressed on sentinel cells such as macrophages and dendritic cells, that recognize structurally conserved molecules derived from microbes.

Related Definition

  1. receptors:

    n (obsolete) One who receives something or someone; in particular, one who harbors a fugitive.

    n (biochemistry, medicine) A protein on a cell wall that binds with specific molecules so that they can be absorbed into the cell in order to control certain functions.

    n (biology) Any specialized cell or structure that responds to sensory stimuli.


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