Detects human and mouse Cathepsin L in direct ELISAs and Western blots. In direct ELISAs and Western blots, no cross-reactivity with recombinant human Cathepsin B, C, L2, O, S, or X/Z/P is observed. In Western blots, both the pro and active forms of recombinant human and mouse Cathspsin L are recognized.

Clonality

Monoclonal

Host

Rat

Isotype

IgG_2A

Scientific Data Images for Human/Mouse Cathepsin L Antibody

Detection of Recombinant Human and Mouse Cathepsin L by Western Blot.

Western blot shows 100 ng of Recombinant Human Cathepsin L (Catalog # 952-CY), Recombinant Mouse Cathepsin L (Catalog # 1515-CY), Recombinant Human Cathepsin V (Catalog # 1080-CY), Recombinant Human Cathepsin K, Recombinant Human Cathepsin S (Catalog # 1183-CY), Recombinant Human Cathepsin H (Catalog # 7516-CY), and Recombinant Human Cathepsin F. PVDF Membrane was probed with 1 µg/mL of Rat Anti-Human/Mouse Cathepsin L Monoclonal Antibody (Catalog # MAB9521) followed by HRP-conjugated Anti-Rat IgG Secondary Antibody (Catalog # HAF005). A specific band was detected for Cathepsin L at approximately 35 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 3. For natural samples, we recommend the use of Catalog # AF1515.

Cathepsin L in Human Kidney.

Cathepsin L was detected in immersion fixed paraffin-embedded sections of human kidney using Rat Anti-Human/Mouse Cathepsin L Monoclonal Antibody (Catalog # MAB9521) at 5 µg/mL overnight at 4 °C. Tissue was stained using the Anti-Rat HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS017) and counterstained with hematoxylin (blue). Specific staining was localized to cytoplasm in tubular epithelial cells. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.

Cathepsin L in Mouse Kidney.

Cathepsin L was detected in immersion fixed frozen sections of mouse kidney using Rat Anti-Human/Mouse Cathepsin L Monoclonal Antibody (Catalog # MAB9521) at 8 µg/mL overnight at 4 °C. Tissue was stained using the Anti-Rat HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS017) and counterstained with hematoxylin (blue). Specific staining was localized to cytoplasm in tubular epithelial cells. View our protocol for Chromogenic IHC Staining of Frozen Tissue Sections.

Applications for Human/Mouse Cathepsin L Antibody

Application

Recommended Usage

Immunohistochemistry

5-25 µg/mL
Sample: Immersion fixed paraffin-embedded sections of human kidney and perfusion fixed frozen sections of mouse kidney

Immunoprecipitation

25 µg/mL
Sample: Conditioned cell culture medium spiked with Recombinant Human Cathepsin L (Catalog # 952-CY) or Recombinant Mouse Cathepsin L (Catalog # 1515-CY), see our available Western blot detection antibodies. This antibody did not immunoprecipitate the pro form of recombinant mouse Cathepsin L.

Western Blot

1 µg/mL
Sample: Recombinant Human Cathepsin L (Catalog # 952-CY)
Recombinant Mouse Cathepsin L (Catalog # 1515-CY)
For natural samples, we recommend the use of Catalog # AF1515

Reviewed Applications

Read 4 reviews rated 4.8 using MAB9521 in the following applications:

Immunohistochemistry (3 Reviews)
Microarrays (1 Review)

Formulation, Preparation, and Storage

Purification

Protein A or G purified from hybridoma culture supernatant

Reconstitution

Reconstitute at 0.5 mg/mL in sterile PBS. For liquid material, refer to CoA for concentration.

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.

12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: Cathepsin L

Cathepsin L is a lysosomal cysteine protease expressed in most eukaryotic cells. Cathepsin L is known to hydrolyze a number of proteins, including the proform of urokinase-type plasminogen activator, which is activated by Cathepsin L cleavage (1). Cathepsin L has also been shown to proteolytically inactivate alpha1-antitrypsin and secretory leucoprotease inhibitor, two major protease inhibitors of the respiratory tract (2). These observations, combined with the demonstration of increased Cathepsin L activity in the epithelial lining fluid of the lungs of emphysema patients, have led to the suggestion that the enzyme may be involved in the progression of this disease. Cathepsin L has also been identified as a major excreted protein of transformed fibroblasts, indicating the enzyme could be involved in malignant tumor growth (3).

References

Goretzki, L. et al. (1992) FEBS Lett. 297:112.
Taggart, C.C. et al. (2001) J. Biol. Chem. 276:33345.
Gottesman, M.M. and F. Cabral (1981) Biochemistry 20:1659.

Alternate Names

CTSL, CTSL1

Entrez Gene IDs

1514 (Human); 13039 (Mouse); 118276442 (Insect)

Gene Symbol

CTSL

UniProt

P07711

Additional Cathepsin L Products

Product Documents for Human/Mouse Cathepsin L Antibody

Product Datasheets

Download Product Datasheets

COA

SDS

Download SDS

Product Specific Notices for Human/Mouse Cathepsin L Antibody

For research use only

Citations
Reviews

Human/Mouse Cathepsin L Antibody

R&D Systems, part of Bio-Techne | Catalog # MAB9521

Key Product Details

Species Reactivity

Validated:

Cited:

Applications