Density functional theory (DFT) at B3LYP/6-31G(d,p) level was employed to calculate intramolecular hydrogen bond enthalpies (HIHB), O-H charge differences, O-H
Flammulin, an anti-tumor protein, was purified from the aqueous extract of basidiomes of Flammulina Velutipes to electrophoretic homogeneity and crystallized by