The amount of a LysM and putative peptidoglycan-binding domain-containing protein 3 when measured in blood serum. The trait is level of LysM and putative peptidoglycan-binding domain-containing protein 3 in blood serum (OBA_2044330, an Ontology of Biological Attributes id). Also known as: blood serum LysM and putative peptidoglycan-binding domain-containing protein 3 amount.