The document lists various ELISA kits for detecting levels of proteins involved in cancer and bone diseases. It provides the product name, detection range, sensitivity, and test method for each kit. All kits use a sandwich ELISA method to detect target proteins within given concentration ranges with sensitivities down to the picogram or nanogram per milliliter level. The kits can be used to analyze levels of proteins including TP53, TNF-α, IL-6, CDKN2A, TGF-β1, TNFSF11, MMP-9, PTEN, EGFR, IFN-γ, CTNNβ1, VEGF-A, FGFR3, BMP-2, IGF-1, PDGFRα, and