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The construct was transiently transfected into HeLa cells together with increasing amounts of expression plasmids encoding GST, wild-type MxB, the short isoform of MxB (MxB 125), an MxB mutant where a specific residue that has been under strong positive selection in Old World monkeys and hominoids was converted to a residue found in New World monkeys (MxB G51Q) 21 , or an MxB mutant with a point mutation in the globular (G) domain that abrogates the GTP-hydrolysing activity (MxB T151A) 47,61

Nat Rev Mol Cell Biol 21(10):607632

Vitamin B12, for example, helps in several ways, but if you dont get enough from your diet, could pills or injections be an option

PMID 28734939