Pectate trisaccharide-lyase (, exopectate-lyase, pectate lyase A, PelA) is an enzyme with systematic name (1âÂÂ4)-ñ-<small>D</small>-galacturonan reducing-end-trisaccharide-lyase. This enzyme catalyses the following chemical reaction:
The predominant action of this enzyme is removal of a trisaccharide.