[quote=@Letter Bee]
[@Burning Kitty], Can the Wolverines still regenerate from a single cell?
[/quote]

The battle that led to the first Marvel Civil War comic event had Logan incinerated down to his Adamantium encased skeleton and he still regenerated. No clue what he regenerated from then.

[quote=marvel.wikia.com]Among the more extreme depictions of his accelerated healing factor involves him having his skin, muscles, and internal organs incinerated from his skeleton only to fully regenerate the tissue within minutes.[/quote]