id | GO:0005057   Detailed information
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  name | receptor signaling protein activity
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  namespace | molecular_function
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  def | "Conveys a signal from an upstream receptor or intracellular signal transducer, converting the signal into a form where it can ultimately trigger a change in the state or activity of a cell." [GOC:bf]
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  comment | This term is intended for annotation of signal transducers that act directly or indirectly downstream of a receptor. For receptors themselves, consider annotating to the term 'receptor activity ; GO:0004872'.
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  is_a | GO:0004871 ! signal transducer activity
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