The amount of a sodium- and chloride-dependent neutral and basic amino acid transporter B(0+) when measured in blood serum. The trait is Ontology of Biological Attributes term OBA_2043540 (level of sodium- and chloride-dependent neutral and basic amino acid transporter B(0+) in blood serum). Also known as: blood serum sodium- and chloride-dependent neutral and basic amino acid transporter B(0+) amount.