level of MAM domain-containing glycosylphosphatidylinositol anchor protein 1 in blood (OBA_2050749, an Ontology of Biological Attributes term) is the amount of a MAM domain-containing glycosylphosphatidylinositol anchor protein 1 when measured in blood. Also known as: blood MAM domain-containing glycosylphosphatidylinositol anchor protein 1 amount.