The amount of a phosphoprotein associated with glycosphingolipid-enriched microdomains 1 (human) when measured in blood. The trait is amount of phosphoprotein associated with glycosphingolipid-enriched microdomains 1 (human) in blood (OBA_2052549). Also known as: blood phosphoprotein associated with glycosphingolipid-enriched microdomains 1 (human) amount.