CFB (260-764) Human, Sf9

Complement Factor B (260-764 a.a.) Human Recombinant, Sf9
Cat. No.
BT30152
Source
Sf9, Baculovirus cells.
Synonyms

CFB, C3/C5 convertase, Glycine-rich beta glycoprotein, GBG, PBF2, Properdin factor B, BF, BFD, AHUS4, ARMD14, CFAB, CFBD, FB, FBI12, GBG, H2-Bf.

Appearance
Sterile Filtered colorless solution.
Purity

Greater than 90.0% as determined by SDS-PAGE.

Usage
Prospec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.
Shipped with Ice Packs
In Stock

Description

CFB Human Recombinant produced in Sf9 Baculovirus cells is a single, glycosylated polypeptide chain containing 514 amino acids (260-764 a.a) and having a molecular mass of 58.1kDa.
CFB is fused to an 9 amino acid His-tag at C-terminus & purified by proprietary chromatographic techniques.

Product Specs

Introduction
Factor B, a single-chain protein found in the bloodstream, plays a crucial role in the complement system. Complement factor D activates Factor B by cleaving it into two subunits: the catalytic subunit Bb and the noncatalytic chain Ba. Subunit Bb, a serine protease, binds to C3b, forming the alternative pathway C3 convertase. Meanwhile, subunit Ba functions as a lymphocyte proliferation inhibitor when Bb is present within lymphocytes. The gene responsible for encoding this protein is located on chromosome six.
Description
Recombinant Human CFB, produced in Sf9 Baculovirus cells, is a single, glycosylated polypeptide chain consisting of 514 amino acids (260-764 a.a). With a molecular mass of 58.1 kDa, CFB is fused to a 9 amino acid His-tag at the C-terminus and purified using proprietary chromatographic techniques.
Physical Appearance
A clear, sterile solution.
Formulation
CFB protein solution at a concentration of 0.5 mg/ml in Phosphate Buffered Saline (pH 7.4) with 20% glycerol.
Stability
For short-term storage (2-4 weeks), keep at 4°C. For extended periods, store frozen at -20°C. Adding a carrier protein (0.1% HSA or BSA) is recommended for long-term storage. Avoid repeated freeze-thaw cycles.
Purity
Purity exceeds 90.0% as determined by SDS-PAGE analysis.
Synonyms

CFB, C3/C5 convertase, Glycine-rich beta glycoprotein, GBG, PBF2, Properdin factor B, BF, BFD, AHUS4, ARMD14, CFAB, CFBD, FB, FBI12, GBG, H2-Bf.

Source
Sf9, Baculovirus cells.
Amino Acid Sequence

ADPKIVLDPS GSMNIYLVLD GSDSIGASNF TGAKKCLVNL IEKVASYGVK PRYGLVTYAT
YPKIWVKVSE ADSSNADWVT KQLNEINYED HKLKSGTNTK KALQAVYSMM SWPDDVPPEG
WNRTRHVIIL MTDGLHNMGG DPITVIDEIR DLLYIGKDRK NPREDYLDVY VFGVGPLVNQ
VNINALASKK DNEQHVFKVK DMENLEDVFY QMIDESQSLS LCGMVWEHRK GTDYHKQPWQ
AKISVIRPSK GHESCMGAVV SEYFVLTAAH CFTVDDKEHS IKVSVGGEKR DLEIEVVLFH
PNYNINGKKE AGIPEFYDYD VALIKLKNKL KYGQTIRPIC LPCTEGTTRA LRLPPTTTCQ
QQKEELLPAQ DIKALFVSEE EKKLTRKEVY IKNGDKKGSC ERDAQYAPGY DKVKDISEVV
TPRFLCTGGV SPYADPNTCR GDSGGPLIVH KRSRFIQVGV ISWGVVDVCK NQKRQKQVPA HARDFHINLF QVLPWLKEKL QDEDLGFLHH HHHH

Product Science Overview

Structure and Function

Complement Factor B is a single-chain glycoprotein that circulates in the blood. It is cleaved by complement factor D into two fragments: Ba and Bb. The Bb fragment is a serine protease that combines with complement factor 3b (C3b) to form the C3 or C5 convertase, which is essential for the activation of the complement pathway . The Ba fragment acts as an inhibitor for the proliferation of lymphocytes .

Recombinant Production

The recombinant form of Complement Factor B (260-764 a.a.) is produced in Sf9 Baculovirus cells. This recombinant protein is a single, glycosylated polypeptide chain containing 514 amino acids (260-764 a.a.) and has a molecular mass of approximately 58.1 kDa . The protein is fused to a 9 amino acid His-tag at the C-terminus and is purified using proprietary chromatographic techniques .

Applications

Recombinant Complement Factor B is used in various research applications, including studies on the complement system, immune response, and related diseases. It is also utilized in biochemical assays to understand the mechanisms of complement activation and regulation.

Storage and Stability

The recombinant protein is typically supplied as a sterile, filtered colorless solution. It is formulated in phosphate-buffered saline (PBS) with 20% glycerol to enhance stability. For short-term storage, it is recommended to keep the protein at 4°C if it will be used within 2-4 weeks. For long-term storage, it should be frozen at -20°C, and it is advisable to add a carrier protein (0.1% HSA or BSA) to prevent degradation .

Purity and Quality Control

The purity of the recombinant Complement Factor B is greater than 90% as determined by SDS-PAGE . This high level of purity ensures that the protein is suitable for various experimental applications without significant contamination.

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