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:
ProteinconcentrationwasdeterminedusingBio-Radproteinassaykit(BioRad,Hercules,CA)and20mug(COS1cells)and75mug(embryos)oflysatesseparatedby15%SDS-PAGE,transferredontonitrocellulosemembrane,incubatedwithprimaryantibody(Shh-N19,1:100)for2hours,followedbydonkeyanti-goatHRPsecondantibody(1:1000)andvisualizedbychemiluminescentdetectionaccordingtomanufacturer'sprotocols(Perkin-ElmerLifeSciences,BostonMA).
["Protein", "protein", "SDS"]