Her cells accumulated lipid-linked oligosaccharides lacking three glucose residues , and sequencing of the ALG6 gene showed what initially appeared to be a homozygous novel point mutation ( 338G > A ) .
O O O B-ChemicalEntity I-ChemicalEntity O O B-ChemicalEntity O O O O O O B-GeneOrGeneProduct O O O O O O O O O O O O O B-SequenceVariant I-SequenceVariant I-SequenceVariant O O