D-maltopentaose + H2O <=> D-maltotetraose + alpha-D-glucose
d-maltopentaose + h2o <=> d-maltotetraose + alpha-d-glucose
D-maltopentaose + H2O <=> D-maltotetraose + alpha-D-glucose
d-maltopentaose + h2o <=> d-maltotetraose + alpha-d-glucose