>6qc9_S4 mol:protein length:133 NADH:ubiquinone oxidoreductase subunit S4AQDQTRDTQLITVDEKLDITTLTGVPEEHIKTRKARIFVPARNNMQSGVNNTKKWKMEFDTRERWENPLMGWASTADPLSNLVLTFSTKEDAIAFAEKNGWSYDVEERKVPKPKSKSYGANFSWNKRTRVSTK