May we ask the MW difference between the active form and the proform of Caspase 8 while performing WB?

Name: Caspase-8 Activity Assay Kit (Colorimetric)
Brand: Novus Biologicals
SKU: NBP3-50233

In treated cells induced to undergo apoptosis, caspase-8 migrates as a 55/53 kDa (pro-form), 41/42 kDa (a cleaved/active or intermediate form), and 18 kDa (active form). The proform (55/53 kDa) is still seen in treated cells because not all cells undergo apoptosis at once.

Caspase-8 Activity Assay Kit (Colorimetric)

Novus Biologicals, part of Bio-Techne | Catalog # NBP3-50233

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Product Specifications
Preparation & Storage
Background
Product Documents
Specific Notices

Key Product Details

Sample Type & Volume Required Per Well

Cell and tissue samples

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Product Specifications

Kit Type

Activity Assay Kit (Colorimetric)

Reactivity

Non-species specific

Description

Caspase 8, also known as FLICE, MACH and Mch5 is self-activated or activated in response to granzyme B cleavage. Caspase 8 specifically recognizes IETD. Activated caspase 8 can not only cleave PARP, but also participate in the activation of other ICE family proteases, such as caspase 3 and caspase 7. This caspase 8 activity assay kit is based on caspase 8 that can catalyze the substrate Ac-IETD-pNA to generate yellow pNA (p-Nitroaniline). The pNA has a strong absorption near 405 nm, The activity of caspase 8 can be calculated by determining the absorbance at 405 nm.

Preparation and Storage

Shipping

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Store at -20C.

Background: Caspase-8

Caspase 8 (CASP8) is a member of the cysteine-aspartic acid protease (caspase) family that is involved in the execution-phase of cell apoptosis. The sequential activation of caspases plays a central role in the execution-phase of cell apoptosis, and Caspase 8 is the most upstream protease in the the caspase activation cascade.

Caspase 8 is expressed as an inactive proenzyme which then undergos proteolytic processing by upstream caspases, to form an active (cleaved) caspase 8 form.

Caspase 8 antibodies are important tools for apoptosis studies and research on the caspase family mediated apoptosis signaling pathway.

Alternate Names

CASP8, Caspase8, Mch5

Gene Symbol

CASP8

Additional Caspase-8 Products

Product Documents for Caspase-8 Activity Assay Kit (Colorimetric)

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COA

Product Specific Notices for Caspase-8 Activity Assay Kit (Colorimetric)

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Kits are guaranteed for 6 months from date of receipt.

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