The amount of a katanin p60 ATPase-containing subunit A-like 1 when measured in blood serum. The trait is level of katanin p60 ATPase-containing subunit A-like 1 in blood serum (OBA_2042083, an Ontology of Biological Attributes term). Also known as: blood serum katanin p60 ATPase-containing subunit A-like 1 amount.