alpha-maltotriose + beta-maltose = alpha-maltotetraose + beta-D-glucose
alpha-maltotriose + beta-maltose = alpha-maltotetraose + beta-d-glucose
alpha-maltotriose + beta-maltose = alpha-maltotetraose + beta-D-glucose
alpha-maltotriose + beta-maltose = alpha-maltotetraose + beta-d-glucose