The type dimension of the market taxonomy is governed by clonal architecture and host species, dictating unit price, lot-to-lot variability and end-user workflow. Monoclonal antibodies supplied 71 % of 2023 revenues; hybridoma-derived murine clones (IgG2a/κ) offer single-epitope specificity demanded by FDA-validated ELISA kits, while recombinant rabbit mAbs produced in CHO lines lower endotoxin loads, capturing premium proteomics contracts. Polyclonal antibodies, 24 % share, are raised in goat and sheep; although affinity-purified lots introduce heterogeneity, they provide signal amplification in IHC panels for tumour microenvironment mapping, hence remain cost-effective for high-throughput pathology cores. Finally, antibody fragments (F(ab′)₂, Fab, scFv), 5 %, are engineered for enhanced tissue penetration in xenograft mouse models and are priced per microgram; growth is accelerating at 12 % CAGR as CAR-T developers adopt anti-HGF scFv for safety switches. Together, these formats create a tiered price ladder from USD 120 /mg for polyclonal sera to > USD 2,000 /mg for endotoxin-free recombinant mAbs, shaping supplier gross margins.