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 => d-maltopentaose + h2o