Within the Xanth series by Piers Anthony, the Naga really are a race of human-headed serpents that can rework between fully human and serpent types, together with any species and size of snake. you can find tyrosine (Y223) and lysine (K139) residues that may also be contributing on the conversation https://naga-2668888.gynoblog.com/30138136/how-much-you-need-to-expect-you-ll-pay-for-a-good-link-naga26