5Z1P:
reference: Structure basis of the improved sweetness and thermostability of a unique double-sites single-chain sweet-tasting protein monellin (MNEI) mutant., Zhao M, Xu X, Liu B, Biochimie. 2018 Nov;154:156-163. doi: 10.1016/j.biochi.2018.08.010. Epub 2018 Sep, 6. PMID: 30195051

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