Molecular autonomous agent

The definition of receptors as specific sites for drug action owes much to the work of John Newton Langley [ 1852-1925 ] and Paul Ehrlich [ 1854-1915 ]. Their separate work on the autonomic nervous system and toxins and chemotherapeutic agents led to the concept of a receptor that possesses both recognition and transduction components and of chemotherapeutic molecules possessing discrete molecular features subserving specific functions ... 

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