Catalogue

Background
Cytokeratins are a subfamily of intermediate filament proteins and are characterized by a remarkable biochemical diversity, represented in epithelial tissues by at least 20 different polypeptides. They range in molecular weight between 40 kDa and 68 kDa and isoelectric pH between 4.9 – 7.8. The individual Cytokeratin polypeptides are numbered 1 to 20. The various epithelia in the Human body usually express Cytokeratins which are not only characteristic of the type of epithelium, but also related to the degree of matuRation or differentiation within an epithelium. Cytokeratin subtype expression patterns are used to an increasing extent in the distinction of different types of epithelial malignancies. The Cytokeratin antibodies are not only of assistance in the differential diagnosis of tumors using immunohistochemistry on tissue sections, but are also a useful tool in cytopathology and flow cytometric assays.

Source
LL020 is a Mouse monoclonal IgM antibody derived by fusion of SP2/0-Ag14 murine myeloma cells with spleen cells from a Mouse immunized with a carboxyterminal peptide of Cytokeratin 6.

Product
Each vial contains 100 ul 1 mg/ml purified monoclonal antibody in PBS containing 0.09% sodium azide.

Formulation: Each vial contains 100 ul 1 mg/ml purified monoclonal antibody in PBS containing 0.09% sodium azide.

Specificity
Keratin 6 is specifically found in hyperprolifeRative squamous epithelium such as psoriatic lesions and squamous cell carcinomas, e.g. of the lung. It is expressed in suprabasal Keratinocytes of wounded epidermis, a situation of high cell turnover. LL020 reacts with the basal and suprabasal layers of the entire outer root sheath in normal skin.

Applications
LL020 can be used as a prolifeRation marker in hyperprolifeRative malignant tissue, such as squamous cell carcinoma of the lung. LL020 is suitable for immunoblotting and for immunohistochemistry on frozen tissue and paraffin embedded tissue. Optimal antibody dilution should be determined by titration.

Storage
The antibody is shipped at ambient temperature and may be stored at +4°C. For prolonged storage prepare appropriate aliquots and store at or below -20°C. Prior to use, an aliquot is thawed slowly in the dark at ambient temperature, spun down again and used to prepare working dilutions by adding sterile phosphate buffered saline (PBS, pH 7.2). Repeated thawing and freezing should be avoided. Working dilutions should be stored at +4°C, not refrozen, and preferably used the same day. If a slight precipitation occurs upon storage, this should be removed by centrifugation. It will not affect the performance or the concentration of the product.

Caution
This product is intended FOR RESEARCH USE ONLY, and FOR TESTS IN VITRO, not for use in diagnostic or therapeutic procedures involving humans or animals. It may contain hazardous ingredients. Please refer to the Safety Data Sheets (SDS) for additional information and proper handling procedures. Dispose product remainders according to local regulations.This datasheet is as accurate as reasonably achievable, but our company accepts no liability for any inaccuracies or omissions in this information.

References
1. Markey, A.C., Lane, E.B., Macdonald, D.M., Leigh, I.M. (1992). Keratin expression in basal cell carcinomas. Br. J. Dermatol. 126, 154-160. 2. Hughes, B.R., Morris, C., Cunliffe, W.J., Leigh, I.M. (2008). Keratin expression in pilosebaceous epithelia in truncal skin of acne patients. Br. J. Dermatol. 134, 247-56. 3. Van der Velden, L.A., Schaafsma, H.E., Ramaekers, F.C. and Kuijpers, W. (1993). Cytokeratin expression in normal and (pre)malignant head and neck epithelia: an overview. Head Neck 15, 133-46. 4. Poschmann, G., Sitek, B., Sipos, B., Ulrich, A., Wiese, S., Stephan, C., Warscheid, B., Klöppel, G., Vander Borght, A., Ramaekers, F.C.S., Meyer, E. and Stühler, K. (2009). IdentifiCation of proteomic differences between squamous cell carcinoma of the lung and bronchial epithelium. Molecular & Cellular proteomics 8, 1105-16.

Protein Reference(s)

Database Name: UniProt

Accession Number: P02538, P04259, P48668

Safety Datasheet(s) for this product: