>6qc4_S4 mol:protein length:133 NADH:ubiquinone oxidoreductase subunit S4AQDQTRDTQLITVDEKLDITTLTGVPEEHIKTRKARIFVPARNNMQSGVNNTKKWKMEFDTRERWENPLMGWASTADPLSNLVLTFSTKEDAIAFAEKNGWSYDVEERKVPKPKSKSYGANFSWNKRTRVSTK