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AB253599

Human CFI Antibody Pair - BSA and Azide free

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Human CFI Antibody Pair - BSA and Azide free is a kit containing recombinant capture and detector antibodies in a carrier-free formulation for the measurement of Human CFI.

View Alternative Names

IF, CFI, Complement factor I, C3B/C4B inactivator

1 Images
Sandwich ELISA - Human CFI Antibody Pair - BSA and Azide free (AB253599)
  • sELISA

Supplier Data

Sandwich ELISA - Human CFI Antibody Pair - BSA and Azide free (AB253599)

Example of Human Complement Factor I standard curve. Background-subtracted data values (mean +/- SD) are graphed.

Key facts

Reacts with

Human

Assay type

ELISA set

Range

15.6 - 4000 pg/mL

Assay Platform

Reagents

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Reactivity data

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Product details

Human CFI Antibody Pair is a matched pair of unconjugated recombinant rabbit monoclonal capture and detection antibodies used to quantify Human CFI in sandwich ELISAs and many other pair-based applications.

Patented technology
Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMAb® patents.

Use our conjugation kits for antibody conjugates that are ready-to-use in as little as 20 minutes with <1 minute hands-on-time and 100% antibody recovery: available for fluorescent dyes, HRP, biotin and gold.

The pair can be used in variety of assays and platforms including but not limited to:

  • Sandwich ELISA
  • FRET/TR-FRET/HTRF
  • Meso Scale Discovery® (MSD®)
  • Bead-based assays
  • AlphaLISA®/AlphaScreen®
  • DELFIA® immunoassays
  • Simoa® and Single Molecule Counting (SMC™) immunoassays
  • Multiplex

Our antibody pairs are supplied in a carrier-free format that is conjugation-ready:

  • Buffer free of BSA, sodium azide, and glycerol for higher conjugation efficiency.
  • Concentration of ~1 mg/ml as measured by the protein A280 method.

We can label antibodies for you: get in touch today to discuss how we can help accelerate your assay development with custom conjugation services.

Pairs are screened in biological samples, including plasma and serum, to ensure specificity in complex samples.

Please note:

The recommended antibody orientation is based on internal optimization in sandwich ELISA. Antibody orientation is assay dependent and needs to be optimized for each assay type.

The range provided for this antibody pair is based on initial sandwich ELISA validation data using recombinant protein. Performance and range of the antibody pair will depend on the specific characteristics of your assay, including standard protein selection.

We guarantee the product works in sandwich ELISA, but we do not guarantee the sensitivity or dynamic range of the antibodies in other assays.

Antibody properties:

Capture antibody: recombinant rabbit monoclonal (unconjugated) – 100 µg

Detector antibody: recombinant rabbit monoclonal (unconjugated) - 100 µg

Concentration: ~1 mg/ml

Storage buffer: 100% PBS

Form: Liquid

Isotype: IgG

Recombinant monoclonal antibodies offer several advantages including:

- High batch-to-batch consistency and reproducibility

- Improved sensitivity and specificity

- Long-term security of supply

- Animal-free production

Meso Scale Discovery and MSD are registered trademarks of Meso Scale Diagnostics, LLC.

AlphaLISA, AlphaScreen, and DELFIA are registered trademarks of PerkinElmer, Inc.

Simoa is a registered trademark of Quanterix, Inc.

SMC is a registered trademark of Merck KGaA, Darmstadt, Germany.

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What's included?

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Properties and storage information

Shipped at conditions
Blue Ice
Appropriate short-term storage conditions
+4°C
Appropriate long-term storage conditions
+4°C
Storage information
+4°C
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Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

Factor I also known as Complement Factor I (CFI) is a serine protease involved in the complement system. Its molecular mass is approximately 88 kDa consisting of a heavy and a light chain linked by a disulfide bond. This protein is mainly expressed in the liver and circulates in the plasma. Factor I inhibits the complement pathways by cleaving complement components C3b and C4b preventing the formation of C3 and C5 convertases.
Biological function summary

Factor I plays a role in maintaining immune homeostasis by preventing excessive complement activation. It acts within a complex that includes cofactors such as Factor H Complement Factor 4 binding protein (C4BP) and Membrane Cofactor Protein (MCP). These interactions allow Factor I to selectively degrade activated complement components ensuring that complement activity is kept in check to avoid host cell damage.

Pathways

Factor I operates in both the classical and alternative complement pathways. In the classical pathway it regulates C3b and C4b breakdown to control the formation of the C3 convertase. In the alternative pathway Factor I works in conjunction with Factor H to degrade C3b. This regulation is important to prevent runaway activation protecting healthy tissue from complement-mediated damage.

Factor I deficiencies can lead to conditions like atypical hemolytic uremic syndrome (aHUS) and age-related macular degeneration (AMD). In aHUS insufficient Factor I activity permits unregulated complement activation leading to thrombotic microangiopathy. In AMD aberrant complement activation contributes to retinal damage and degeneration. These conditions illustrate the need for balanced Factor I activity to prevent disease.
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Product protocols

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Target data

Trypsin-like serine protease that plays an essential role in regulating the immune response by controlling all complement pathways. Inhibits these pathways by cleaving three peptide bonds in the alpha-chain of C3b and two bonds in the alpha-chain of C4b thereby inactivating these proteins (PubMed : 17320177, PubMed : 7360115). Essential cofactors for these reactions include factor H and C4BP in the fluid phase and membrane cofactor protein/CD46 and CR1 on cell surfaces (PubMed : 12055245, PubMed : 2141838, PubMed : 9605165). The presence of these cofactors on healthy cells allows degradation of deposited C3b by CFI in order to prevent undesired complement activation, while in apoptotic cells or microbes, the absence of such cofactors leads to C3b-mediated complement activation and subsequent opsonization (PubMed : 28671664).
See full target information CFI
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Product promise

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For full details, please see our Terms & Conditions

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