分子生物学48742850
Noncovalent interactions
The Random coil 缠绕Linear polypeptide and polynucleotide chains contain bonds about which there is free rotation.In the absence of any intrastrand（分子内） interactions, each monomer would be free to rotate with respect to its adjacent monomersFew, if any, nucleic acid or protein molecules exist in nature as random coils because of many interactions between elements of the chains Noncovalent interactionsHydrogen bonds 氢键The hydrophobic interaction 疏水作用Ionic bond ...