Of these, eleven proteins [Isoform A of Prelamin-A/C (LMNA), Tropomyosin α-4 chain (TPM4), Filamin-A (FLNA), Myosin-9 (MYH9), Apolipoprotein C-I (APOC1), Platelet factor 4 variant (PF4V1), Serum amyloid A-2 protein (SAA2), Serum amyloid A-4 protein (SAA4), Haptoglobin (HP), Actin, cytoplasmic 2 (ACTG1), and Neurexin-2-β (NRX2B)] differentially expressed in more than 3 CHD subtype groups were chosen for further verification using MRM-MS. This evidence concerns the gene HP and coronary artery disorder.