[Purification of beta-lactamases by affinity chromatography].

Affinity columns able to purifie beta-lactamases have been prepared either by linking covalently reversible inhibitors or substrates to agarose beds. The enzyme is eluted with a gradient of sodium chloride or released with the substrate. This method is a pertinent one for the purification of these enzymes and for the study of bacteria harbouring more than one beta-lactamase.