FCN1 (ficolin-1) is a pattern recognition molecule with enriched expression in classical monocytes. FCER1A, TXNIP (thioredoxin interacting protein), and FCAR (Fc alpha receptor, CD89) show enriched expression in CD14⁺CD16⁻ classical monocytes specifically. Together these markers identify the classical monocyte subset and distinguish them from non-classical and intermediate monocyte populations.