guanine + 5-phospho-alpha-D-ribose 1-diphosphate => GMP + diphosphate
guanine + 5-phospho-alpha-d-ribose 1-diphosphate => gmp + diphosphate
guanine + 5-phospho-alpha-D-ribose 1-diphosphate => GMP + diphosphate
guanine + 5-phospho-alpha-d-ribose 1-diphosphate => gmp + diphosphate