You will be presented a sentence from biomedical research text. Extract all terms that correspond to chemical entities of biological interest (ChEBI).
Return your identified terms in a JSON array, formatted like this: ["Entity1", "Entity2", ...].
If no such entities are detected, respond by providing an empty JSON array [].

Biomedical context:
ArepresentativegelofRT-PCRusingprimersF546andR721,showingthatonlyRNAfromtheskinandthymusbutnotliverofmicepositiveforK14-crehavetranscriptsfrombothwild-type(528bp)anddeleted(313bp)Apcalleles.
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