ID 3.2.1.2 DE beta-amylase. AN 4-alpha-D-glucan maltohydrolase. AN glycogenase. AN saccharogen amylase. CA Hydrolysis of (1->4)-alpha-D-glucosidic linkages in polysaccharides so as CA to remove successive maltose units from the non-reducing ends of the CA chains. CC -!- Acts on starch, glycogen and related polysaccharides and CC oligosaccharides producing beta-maltose by an inversion. DR P36924, AMYB_BACCE ; P96513, AMYB_CYTFI ; P82993, AMYB_HORVS ; DR P16098, AMYB_HORVU ; P10537, AMYB_IPOBA ; P55005, AMYB_MAIZE ; DR O22585, AMYB_MEDSA ; P06547, AMYB_NIACI ; P21543, AMYB_PAEPO ; DR P30271, AMYB_SECCE ; P10538, AMYB_SOYBN ; P19584, AMYB_THETU ; DR O65015, AMYB_TRIRP ; O64407, AMYB_VIGUN ; P93594, AMYB_WHEAT ; DR Q9LIR6, BAM1_ARATH ; O65258, BAM2_ARATH ; O23553, BAM3_ARATH ; DR P25853, BAM5_ARATH ; Q8L762, BAM6_ARATH ; O80831, BAM7_ARATH ; DR Q9FH80, BAM8_ARATH ; Q9AV88, BAMY1_ORYSJ; Q10RZ1, BAMY2_ORYSJ; //