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Cathepsin L (Cathepsin L heavy chain, Cathepsin L light chain, CATL, CTSL, Major excreted protein, MEP)

Cat no: C2097-70J


Supplier: United States Biological
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Cathepsins are lysosomal proteases that play an important role in the intracellular degradation of exogenous and endogenous proteins, activation of enzyme precursors, and tumor invasion and metastasis. Normally located in lysosomes of almost all mammalian cells, they can be secreted from the cell under certain conditions. Cathepsin L is responsible for most of the intralysosomal breakdown of normal cells. Cathepsin L is secreted by numerous transformed cells in its inactive proform, and mRNA expression level seems to correlate with their metastatic potential. Applications: Suitable for use in ELISA, Western Blot, Immunohistochemistry and Functional Studies. Other applications not tested. Recommended Dilution: ELISA: 1:200 Immunohistochemistry: frozen sections Functional Studies: Suppresses the growth of malignant myeloma cells. Optimal dilutions to be determined by the researcher. Positive Control: Whole cell extract from cultured mink lung cell line. Storage and Stability: May be stored at 4 degrees C for short-term only. For long-term storage and to avoid repeated freezing and thawing, aliquot Store at -20 degrees C. Aliquots are stable for at least 12 months at -20 degrees C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
Catalogue number: C2097-70J
Reactivities: Human, Mouse, Rat
Hosts: Mouse
Applications: ELISA, Immunohistochemistry, Western Blot
Size: 100ul
Form: Supplied as a liquid, 15mM sodium azide.
P type: Mab
Isotype: IgG1
Purity: Ascites
Alternative names: Cathepsin L heavy chain, Cathepsin L light chain, CATL, CTSL, Major excreted protein, MEP
References: 1. Sivaparvathi M <i>et al.</i> Expression and immunohistochemical localization of cathepsin L during the progression of human gliomas. <i>Clin Exp Metastasis</i> <b>14</b>:27-34 (1996). <PUBMED:8521613> 2. Igdoura SA <i>et al.</i> Differential expression of cathepsins B and D in testis and epididymis of adult rats. <i>J Histochem Cytochem</i> <b>43</b>:545-57 (1995). <PUBMED:7730593> 3. Weber E <i>et al.</i> Hybridoma cells producing antibodies to cathepsin L have greatly reduced potential for tumour growth. <i>J Cancer Res Clin Oncol</i> <b>120</b>:564-7 (1994). <PUBMED:8045924> 4. Mignatti P & Rifkin DB Biology and biochemistry of proteinases in tumor invasion. <i>Physiol Rev</i> <b>73</b>:161-95 (1993). <PUBMED:8419965> 5. Heidtmann HH <i>et al.</i> Secretion of a latent, acid activatable cathepsin L precursor by human non-small cell lung cancer cell lines. <i>Oncol Res</i> <b>5</b>:441-51 (1993). <PUBMED:8054705> 5. Yamaguchi N <i>et al.</i> Characterization of a cathepsin L-like enzyme secreted from human pancreatic cancer cell line HPC-YP. <i>Cancer Res</i> <b>50</b>:658-63 (1990). <PUBMED:2297706> 6. Trabandt A <i>et al.</i> Expression of the collagenolytic and Ras-induced cysteine proteinase cathepsin L and proliferation-associated oncogenes in synovial cells of MRL/I mice and patients with rheumatoid arthritis. <i>Matrix</i> <b>10</b>:349-61 (1990). <PUBMED:2084514> 7. Bellelli A <i>et al.</i> Inhibition of tumor growth, invasion and metastasis in papain-immunized mice. <i>Invasion Metastasis</i> <b>10</b>:142-69 (1990). <PUBMED:2139872> 8. Yagel S <i>et al.</i> Suppression by cathepsin L inhibitors of the invasion of amnion membranes by murine cancer cells. <i>Cancer Res</i> <b>49</b>:3553-7 (1989). <PUBMED:2731177> 9. Denhardt DT <i>et al.</i> Cysteine proteinase cathepsin L expression correlates closely with the metastatic potential of H-ras-transformed murine fibroblasts. <i>Oncogene</i> <b>2</b>:55-9 (1987). <PUBMED:3438085> 10. Kirschke H and Barrett AJ Chemistry of lysosomal proteases in lysosomes: Their role in protein breakdown <i>Academic Press</i> <b></b>:193-239 (1981). 11. Kirschke H <i>et al.</i> Cathepsin L. A new proteinase from rat-liver lysosomes. <i>Eur J Biochem</i> <b>74</b>:293-301 (1977). <PUBMED:15835>
Additional info: Recognizes native and denatured forms of human cathepsin L (25kD) and procathepsin L (42kD). Does not react with human cathepsin types B, D, H and S, procathepsins B and D, and procathepsin H, rat cathepsin B, and mouse procathepsins B and D. Species Crossreactivity: mouse procathepsin L (weak), rat cathepsin L (strong), and mink cathepsin and procathepsin L.

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