Product Specification Formulation: Lyophilized. Contains sodium azide. Source/Host: From Vibrio cholerae. Long Term Storage: +4°C Miscellaneous/General: The A subunit of cholera toxin possesses ADP-ribosyltransferase activity but is unable to penetrate cells in the absence of the B subunit. It is however, as effective as the native toxin in catalyzing ADP-ribosylation in broken cell preparations.
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