N4-Aminocytidine positive control mutagen for Ames MPF and umuC assays. 1.5 mg. Direct-acting — no S9 required. Research use only.

N4-Aminocytidine is a direct-acting mutagen that induces G:C→A:T transitions without metabolic activation. Used as the direct-acting positive control in Ames and umuC assays performed without S9, confirming tester strain responsiveness and medium quality under non-metabolic conditions. No S9 activation required.

• Direct-acting mutagen — no S9 activation required
• Induces base-pair substitutions (G:C→A:T transitions)
• For direct-acting positive control validation
• 1.5 mg supply