These enzymes form a multienzyme metabolic complex, which translocates to the nucleus during S (DNA replication) and G2/M (DNA damage checkpoint) phases, and is required for biosynthesis of the nucleotide precursor, thymidylate, which is critical to DNA synthesis and repair
If you have a B12 deficiency you will be lucky to get the best treatment recommended as it seems to me that GPs pick and choose based on outdated understanding of research and good practice
In a multi-use Torbac saline solution presentation, that allows the same container to be drawn from over a working period, commonly cited as up to 28 days when stored correctly, without the contamination risk you would accept with preservative-free saline
Temperature excursions accelerate these reactions exponentially
In contrast, cyanocobalamin is the synthetic, least expensive form of vitamin B12 and the only FDA-approved form