4-carboxymethyl-4-methylbutenolide mutase activity
Catalysis of the reaction: 4-carboxymethyl-4-methylbut-2-en-1,4-olide = 4-carboxymethyl-3-methylbut-2-en-1,4-olide.
GO:0016866
intramolecular transferase activity
is_a
4-carboxymethyl-4-methylbut-2-en-1,4-olide methylmutase activity
related
4-methyl-2-enelactone isomerase activity
related
4-methyl-2-enelactone methyl-isomerase activity
related
4-methyl-3-enelactone methyl isomerase activity
related
4-methylmuconolactone methylisomerase activity
related