crotonobetaine + (R)-carnitinyl-CoA => crotonobetainyl-CoA + (R)-carnitine
crotonobetaine + (r)-carnitinyl-coa => crotonobetainyl-coa + (r)-carnitine
crotonobetaine + (R)-carnitinyl-CoA => crotonobetainyl-CoA + (R)-carnitine
crotonobetaine + (r)-carnitinyl-coa => crotonobetainyl-coa + (r)-carnitine