alpha-maltohexaose + phosphate <=> alpha-maltopentaose + alpha-D-glucose 1-phosphate
alpha-maltohexaose + phosphate <=> alpha-maltopentaose + alpha-d-glucose 1-phosphate
alpha-maltohexaose + phosphate <=> alpha-maltopentaose + alpha-D-glucose 1-phosphate
alpha-maltohexaose + phosphate <=> alpha-maltopentaose + alpha-d-glucose 1-phosphate