ID 3.2.1.173 DE rhamnogalacturonan galacturonohydrolase. AN RG-galacturonohydrolase. CA Exohydrolysis of the alpha-D-GalA-(1->2)-alpha-L-Rha bond in CA rhamnogalacturonan oligosaccharides with initial inversion of CA configuration releasing D-galacturonic acid from the non-reducing end of CA rhamnogalacturonan oligosaccharides. CC -!- The enzyme is part of the degradation system for rhamnogalacturonan I CC in Aspergillus aculeatus. //