CENTA, a chromogenic cephalosporin, is readily hydrolyzed by B-lactamases of all classes except for the Aeromonas hydrophila metalloenzyme. Although it cannot practically be used for the detection of beta -lactamase-producing strains on agar plates, it should be quite useful for kinetic studies and the detection of the enzymes in crude extracts and chromatographic fractions.
Bebrone, C ; Moali, C ; Mahy, F ; Rival, S ; Docquier, JD ; et. al. CENTA as a chromogenic substrate for studying beta-lactamases. In: Antimicrobial Agents and Chemotherapy, Vol. 45, no. 6, p. 1868-1871 (2001)