The amount of a discoidin, CUB and LCCL domain-containing protein 1 when measured in blood serum. The trait is level of discoidin, CUB and LCCL domain-containing protein 1 in blood serum (OBA_2044468, an Ontology of Biological Attributes id). Also known as: blood serum discoidin, CUB and LCCL domain-containing protein 1 amount.