The series of events required for a sour taste stimulus to be received and converted to a molecular signal.
Synonyms:
exact_synonym:
perception of sour taste, detection of chemical stimulus; perception of sour taste, sensory transduction of chemical stimulus; sensory detection of chemical stimulus during perception of sour taste; sensory detection of sour taste; sensory transduction of chemical stimulus during perception of sour taste; sensory transduction of sour taste; sour taste detection