Translations:Vitamin B12/53/en

A related concept is antivitamin B₁₂, compounds (often synthetic B₁₂ analogues) that not only have no vitamin action, but also actively interfere with the activity of true vitamin B₁₂. The design of these compounds mainly involve replacement of the metal ion with rhodium, nickel, or zinc; or the attachment of an inactive ligand such as 4-ethylphenyl. These compounds have the potential to be used for analyzing B₁₂ utilization pathways or even attacking B₁₂-dependent pathogens.