title: GM2 gangliosidosis with a motor neuron disease phenotype: clinical heterogeneity of hexosaminidase deficiency disease.
mesh_terms: D000690:Amyotrophic Lateral Sclerosis / Q000175:diagnosis / Q000201:enzymology / Q000235:genetics*; D003937:Diagnosis, Differential; D007527:Isoenzymes / Q000172:deficiency; D010641:Phenotype; D012497:Sandhoff Disease / Q000175:diagnosis / Q000235:genetics; D013661:Tay-Sachs Disease / Q000175:diagnosis / Q000235:genetics; D001619:beta-N-Acetylhexosaminidases / Q000172:deficiency* / Q000235:genetics
chemical_list: D007527:Isoenzymes; D001619:beta-N-Acetylhexosaminidases