response to acid chemical This term should be used to describe a response to a specific acid as a chemical. E.g., if an organism were responding to glutamate, then the response would be glutamate-specific; the organism is actually responding to the chemical structure of the anion portion of the dissociated acid. Note that this term is in the subset of terms that should not be used for direct gene product annotation. Instead, select a child term or, if no appropriate child term exists, please request a new term. Direct annotations to this term may be amended during annotation QC. If annotating experiments where an acid is playing a role as a proton donor, please annotate to GO:0010447 'response to acidic pH' instead. response to chemical