I'm getting a bit confused about some technical terms relating to the B12 issue. For many years I thought the term "analogues" related exclusively to the inactive forms of B12, only now I seem to realise it actually relates to all forms of B12, whether active or not. Can someone confirm this? I find it is used in both ways in many texts that are abundant on the web and it really does my head in!
Also, relating to corrinoids and cobalamins, the impression I have is that corrinoids are exclusively the inactive forms, whilst cobalamins are the active ones, and again, I find the terms being (ab)used with both meanings! Could someone clarify this?
Many thanks, all the best