[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][C][=Branch2][Branch2][P][=C][C][=C][Ring1][=Branch1][C][C@@H1][Branch2][#Branch1][Branch2][C][=Branch1][C][=O][N][C@@H1][Branch1][=Branch1][C][C][C][C][N][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][O][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][O][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][O][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][O][C][=Branch1][C][=O][N][C@@H1][Branch1][=Branch1][C][C][C][C][N][C][=Branch1][C][=O][O][N][C][=Branch1][C][=O][C@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][O][N][O]"}, {"from": "gpt", "value": "The molecule is an eight amino acid peptide consisting of L-aspartic acid, L-tyrosine, L-lysine, four L-aspartic acid residues, and L-lysine joined in sequence by peptide linkages. It is widely used as a fusion tag for the purification and detection of a wide variety of recombinant proteins."}]