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Official Symbol: | C4B |
NCBI Gene ID: | 721 |
Content / Scale: |
C4B1 C4B12 C4B2 C4B3 C4B5 C4BD C4B_2 C4F CH CO4 CPAMD3 |
Official Full Name: | complement C4B (Chido blood group) |
Species: | human |
Summary: | This gene encodes the basic form of complement factor 4, and together with the C4A gene, is part of the classical activation pathway. The protein is expressed as a single chain precursor which is proteolytically cleaved into a trimer of alpha, beta, and gamma chains prior to secretion. The trimer provides a surface for interaction between the antigen-antibody complex and other complement components. The alpha chain may be cleaved to release C4 anaphylatoxin, a mediator of local inflammation. Deficiency of this protein is associated with systemic lupus erythematosus. This gene localizes to the major histocompatibility complex (MHC) class III region on chromosome 6. Varying haplotypes of this gene cluster exist, such that individuals may have 1, 2, or 3 copies of this gene. In addition, this gene exists as a long form and a short form due to the presence or absence of a 6.4 kb endogenous HERV-K retrovirus in intron 9. [provided by RefSeq, May 2020]. |
Order a complex pool of 30 siRNAs (siPOOL) for the specific gene knockdown of human gene C4B.
siPOOLs (siRNA pools) are high complexity pools of 30 optimally selected siRNAs designed to specifically knock-down the target gene of your choice.
Using 30 siRNAs at a picomolar concentration dilutes and significantly minimizes the off-target effects of each siRNA, therefore highly increasing the on-target specificity. On the other hand, individual siRNAs or low complexity siRNA pools containing only 2-4 siRNAs often display dominant off-target profiles and exhibit variable target gene knock-downs.
As reaction numbers depend on transfection efficiencies and well/plate format used, please refer to our FAQ section or siPOOL transfection protocol for more information.
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siPOOL- 2
2 nmol siPOOL Price: € 295,00 |
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2 nmol siPOOL Pool of pre-selected ~30 siRNAs against the target gene. HPLC-purified, in 50µM solution. |
siPOOL- 5
5 nmol siPOOL Price: € 548,00 |
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5 nmol siPOOL, pool of 30 pre-selected siRNAs against the target gene. HPLC-purified, in 50µM solution. |
siPOOL- 5 Kit
5 nmol siPOOL 5 nmol negative control siPOOL Price: € 699,00 |
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This kit contains the target-specific siPOOL and a negative control siPOOL against sequences not found in mouse, rat or human. Amount provided: 5 nmol / siPOOL. HPLC-purified, in 50µM solution. |
siPOOL-10
10 nmol siPOOL Price: € 692,00 |
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10 nmol siPOOL, pool of 30 pre-selected siRNAs against the target gene. HPLC-purified, in 50µM solution. |
siPOOL-10 Kit
10 nmol siPOOL 10 nmol negative control siPOOL Price: € 925,00 |
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This kit contains the target-specific siPOOL and a negative control siPOOL against sequences not found in mouse, rat or human. Amount provided: 10 nmol / siPOOL. HPLC-purified, in 50µM solution. |
siPOOL-20
20 nmol siPOOL Price: € 1.041,00 |
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20 nmol siPOOL, pool of 30 pre-selected siRNAs against the target gene. HPLC-purified, in 50µM solution. |
siPOOL-20 kit
20 nmol siPOOL 20 nmol negative control siPOOL Price: € 1.369,00 |
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This kit contains the target-specific siPOOL and a negative control siPOOL against sequences not found in mouse, rat or human. Amount provided: 20 nmol / siPOOL. HPLC-purified, in 50µM solution. |
siPOOL-40
40 nmol siPOOL Price: € 1.665,00 |
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40 nmol siPOOL, pool of 30 pre-selected siRNAs against the target gene. HPLC-purified, in 50µM solution. |
siPOOL-40 kit
40 nmol siPOOL 40 nmol negative control siPOOL Price: € 2.565,00 |
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This kit contains the target-specific siPOOL and a negative control siPOOL against sequences not found in mouse, rat or human. Amount provided: 40 nmol / siPOOL. HPLC-purified, in 50µM solution. |