>4YH1_1|Chains A, B|Carboxy-terminal domain RNA polymerase II polypeptide A small phosphatase 1|Homo sapiens (9606) GSHGQYLLPEAKAQDSDKICVVINLDETLVHSSFKPVNNADFIIPVEIDGVVHQVYVLKRPHVDEFLQRMGELFECVLFTASLAKYADPVADLLDKWGAFRARLFRESCVFHRGNYVKDLSRLGRDLRRVLILDNSPASYVFHPDNAVPVASWFDNMSDTELHDLLPFFEQLSRVDDVYSVLRQPRPGS >4YH1_2|Chains C, D|A small phosphatase 1|synthetic construct (32630) XSPYSPTXSYSX