CD55/DAF Antibody [Unconjugated]

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CD55/DAF was detected in immersion fixed paraffin-embedded sections of human colon cancer tissue using 15 µg/mL Goat Anti-Human CD55/DAF Antigen Affinity-purified Polyclonal Antibody (Catalog # AF2009) overnight at 4 ...read more

Product Details

Summary
Reactivity HuSpecies Glossary
Applications WB, IHC
Clonality
Polyclonal
Host
Goat
Conjugate
Unconjugated
Concentration
LYOPH

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Catalog# & Conjugate Size Price

CD55/DAF Antibody [Unconjugated] Summary

Immunogen
Mouse myeloma cell line NS0-derived recombinant human CD55/DAF
Asp35-Ser353
Accession # P08174
Specificity
Detects human CD55/DAF in direct ELISAs and Western blots.
Source
N/A
Isotype
IgG
Clonality
Polyclonal
Host
Goat
Gene
CD55
Innovator's Reward
Test in a species/application not listed above to receive a full credit towards a future purchase.

Applications/Dilutions

Dilutions
  • Western Blot 0.1 ug/mL
  • Immunohistochemistry 5-15 ug/mL
Publications
Read Publications using
AF2009 in the following applications:

Packaging, Storage & Formulations

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.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
Preservative
No Preservative
Concentration
LYOPH
Reconstitution Instructions
Reconstitute at 0.2 mg/mL in sterile PBS.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for CD55/DAF Antibody [Unconjugated]

  • CD55 antigen
  • CD55 molecule, decay accelerating factor for complement (Cromer blood group)
  • CD55
  • CR
  • CRdecay accelerating factor for complement (CD55, Cromer blood group system)
  • CROMDAFcomplement decay-accelerating factor
  • DAF
  • decay accelerating factor for complement
  • TC

Background

CD55, also known as DAF or decay-accelerating factor, is a 70‑75 kDa member of the RCA family of proteins. Human RCA (regulators of complement/C’ activation) proteins are products of chromosome 1 genes that are ubiquitously expressed on cells exposed to plasma complement proteins (1‑4). A hallmark of RCA proteins is the presence of four to 30 SCRs (short consensus repeats; also called CCPs for C’ control protein modules) in their plasma-exposed regions. SCRs are characterized by a 60‑65 amino acid (aa) module that contains a highly conserved Trp residue and two internal disulfide bonds that create a beta -barrel structure (1). Human CD55 is synthesized as a 381 aa precursor that contains a 34 aa signal sequence, a 319 aa mature region and a 28 aa C-terminal prosegment (5, 6). The mature region contains four SCR modules and a C-terminal O-glycosylated extension (7). Following cleavage of the prosegment, a serine is exposed that serves as an anchor for a GPI-linkage (8). Multiple polymorphisms are found in the molecule. Alternate splicing also exists. One form that may not be translated shows an intron insertion in the prosegment, resulting in a 79 aa substitution for the standard C-terminal 20 aas of the prosegment (6). Another form generates a truncated 199 aa precursor that cannot be membrane-bound and may not be secreted (9). Mature CD55 is 53% and 84% aa identical to mouse and monkey CD55, respectively. CD55 is known to bind CD97 via the first SCR (4). It also binds physiologically-generated C3 convertases with its second and third SCRs (7, 10). Binding results in an accelerated “decay”, or dissociation of active C3 convertases, thus blocking the development of C’ attack complexes on nonforeign cells (1, 2). Finally, viruses and bacteria are also known to utilize multiple SCR sites for infection (4).

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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Publications for CD55/DAF Antibody (AF2009)(3)

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Bioinformatics

Gene Symbol CD55
Entrez
Uniprot