Before revision:  An analytical form of the formula on protein folding rate is obtained. The proposed quantum protein folding theory affords a unifying approach to the study of a large class problems of biological conformational change , for example, the quantum transition of tubulin dimer in microtubules, the ligand binding in G protein coupled receptors in membrane, the histone modification in nucleic acid through atomic group binding and the protein photo folding processes, etc.
After revision:  An analytical form of the formula on protein folding rate and the curious non-Arrhenius temperature relation is interpreted. The decoherence time of quantum torsion state is estimated and the quantum coherence degree of torsional angles in the protein folding is studied by using temperature dependence data. The proposed folding rate formula gives a unifying approach to the study of a large class problems of biological conformational change , for example, the quantum transition of tubulin dimer in microtubules, the ligand binding in G protein coupled receptors in membrane, the histone modification in nucleic acid through atomic group binding and the protein photo folding processes, etc.