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anti-Keratin K19 mouse monoclonal, Ks19.1 (A53-B/A2), prediluted, purified

Ks19.1 represents an excellent marker to discriminate glandular epithelial carcinoma from those of different origin. No reaction with hepatocellular carcinoma. For best performance, Microwave treatment is recommended.
Cat. No.: 65010
Quantity:  5 mL

Delivery Time: usually 1-7 working days

Excl. 19% Tax, excl. Shipping Cost

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anti-Keratin K19 mouse monoclonal, Ks19.1 (A53-B/A2), lyophilized, purified

50 µg
Excl. 19% Tax, excl. Shipping Cost

Product description

Host mouse
Antibody Type monoclonal
Isotype IgG2a
Clone Ks19.1 (A53-B/A2)
Immunogen Keratin K19 of Mr 40 000; from cultured human MCF-7 cells
Purification protein A affinity chromatography
Conjugate unconjugated
Formulation PBS pH 7.4 with 0.5% BSA and 0.09% sodium azide
Storage short term at 2 – 8 °C; long term storage in aliquots at - 20 °C; avoid freeze/ thaw cycles
Tested species reactivity human
Intended use Research use only


Tested applications Tested dilutions
Immunocytochemistry (ICC)/ Immunofluorescence (IF) assay dependent
Immunohistochemistry (IHC) - frozen ready-to-use
Immunohistochemistry (IHC) - paraffin ready-to-use (microwave treatment recommended)
Western Blot (WB) assay dependent



Ks 19.1 represents an excellent marker to discriminate glandular epithelial carcinoma from those of different origin. No reaction with hepatocellular carcinoma.
Polypeptide reacting: Mr 40 000 polypeptide (keratin K19; formerly also designated cytokeratin 19) of human glandular epithelia.
The epitope has been localized on aa. 311-335 (QSQLSMKAALEDTLAETEARFGAQL) of the a-helical fragment.
Tumors specifically detected: All tested adenocarcinoma; cholangio ca. of liver; renal cell carcinoma; transitional cell ca. of the bladder; ovary ca.; squamous cell ca. of cervix, bronchus and lung (intermediate type); mesothelioma; carcinoid tumor of bronchus; breast ca.; thymoma.
Reactivity on cultured cell lines: MCF-7, RT 112, Detroit 562, RPMI 2650, HT-29, SSC-12.



Langbein, L., Yoshida, H., Praetzel-Wunder, S., Parry, D. A. & Schweizer, J. The Keratins of the Human Beard Hair Medulla: The Riddle in the Middle. J. Invest. Dermatol. 130, 55–73 (2010). human IHC (frozen)
Höchtlen-Vollmar, W. et al. Occult epithelial tumor cells detected in bone marrow by an enzyme immunoassay specific for cytokeratin 19. Int. J. cancer 70, 396–400 (1997). human ELISA
Dittadi, R. et al. Standardization of assay for cytokeratin-related tumor marker CYFRA21.1 in urine samples. Clin. Chem. 42, 1634–8 (1996). human ELISA
Demirkesen, C., Hoede, N. & Moll, R. Epithelial markers and differentiation in adnexal neoplasms of the skin: an immunohistochemical study including individual cytokeratins. J. Cutan. Pathol. 22, 518–35 (1995). human IHC (paraffin)
Grenier, J. et al. Cyfra 21-1, a new marker of lung cancer. Nucl. Med. Biol. 21, 471–476 (1994). human ELISA
Van Der Gaast ’, A. et al. Evaluation of a new tumour marker in patients with non-small-cell lung cancer: Cyfra 21.1. Br. J. Cancer 69, 525–528 (1994). human ELISA
Sugama, Y. et al. Clinical usefulness of CYFRA assay in diagnosing lung cancer: measurement of serum cytokeratin fragment. Jpn. J. Cancer Res. 85, 1178–84 (1994). human ELISA
Pujol, J. L. et al. Serum fragment of cytokeratin subunit 19 measured by CYFRA 21-1 immunoradiometric assay as a marker of lung cancer. Cancer Res. 53, 61–6 (1993). human ELISA
Stieber, P. et al. CYFRA 21-1. A new marker in lung cancer. Cancer 72, 707–13 (1993). human ELISA
Lindberg, K. & Rheinwaldtt, J. G. Suprabasal 40 kd Keratin (K19) Expression as an Immunohistologic Marker of Premalignancy in Oral Epithelium. Am. J. Pathol. 134, 89–98 (1989). human IHC (paraffin)
Bosch, F. X., Leube, R., Achtstätter, T., Moll, R. & Franke, W. W. Expression of Simple Epithelial Type Cytokeratins In Stratified Epithelia as Detected by Immunolocalization and Hybridization In Situ. J. Cell Biol. 106, 1635–1648 (1988). human IHC (frozen)
Moll, I; Heid, H; Moll, R. Cytokeratin analysis of pilomatrixoma: changes in cytokeratin-type expression during differentiation. J. Invest. Dermatol. 91, 251–7 (1988). human IHC (frozen)
Moll, R. et al. Cytokeratins in normal and malignant transitional epithelium: maintenance of expression of urothelial differentiation features in transitional cell carcinomas and bladder carcinoma cell culture lines. Am. J. Pathol. 132, 123–144 (1988). human IHC (frozen), ICC-IF
Heid, H. W., Moll, I. & Franke, W. W. Patterns of expression of trichocytic and epithelial cytokeratins in mammalian tissues. II. Concomitant and mutually exclusive synthesis of trichocytic and epithelial cytokeratins in diverse human and bovine tissues (hair follicle, nail bed and matrix, lingual papilla, thymic reticulum). Differentiation 37, 215–230 (1988). human IHC (frozen)
Heid, H. W., Moll, I. & Franke, W. W. Patterns of expression of trichocytic and epithelial cytokeratins in mammalian tissues. I. Human and bovine hair follicles. Differentiation. 37, 137–57 (1988). human IHC (frozen)
Balaton, A. J., Nehama-Sibony, M., Gotheil, C., Callard, P. & Baviera, E. E. Distinction between hepatocellular carcinoma, cholangiocarcinoma, and metastatic carcinoma based on immunohistochemical staining for carcinoembryonic antigen and for cytokeratin 19 on paraffin sections. J. Pathol. 156, 305–310 (1988). human IHC (paraffin)
Dockhorn-Dworniczak, B. et al. Patterns of expression of cytoskeletal proteins in human thyroid gland and thyroid carcinomas. Differentiation. 35, 53–71 (1987). human IHC (frozen)
Kasper, M., Stosiek, P., Typlt, H. & Karsten, U. Histological evaluation of three new monoclonal anti-cytokeratin antibodies. 1. Normal tissues. Eur. J. Cancer Clin. Oncol. 23, 137–47 (1987). human IHC (frozen)
Karsten, U. et al. Monoclonal anti-cytokeratin antibody from a hybridoma clone generated by electrofusion. Eur. J. Cancer Clin. Oncol. 21, 733–40 (1985). human ICC-IF

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