A9669

Sigma-Aldrich

Anti-Human IgA (α-chain specific)−Alkaline Phosphatase antibody produced in goat

affinity isolated antibody, buffered aqueous solution

MDL number:
NACRES:
NA.46

Quality Level

biological source

goat

antibody form

affinity isolated antibody

antibody product type

secondary antibodies

clone

polyclonal

form

buffered aqueous solution

application(s)

direct ELISA: 1:35,000
dot blot: 1:30,000
immunohistochemistry (formalin-fixed, paraffin-embedded sections): 1:100

conjugate

alkaline phosphatase conjugate

shipped in

wet ice

storage temp.

2-8°C

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General description

Immunoglobulin A (IgA) is the most abundant antibody isotype produced in humans. IgAs are heterogeneous and exist as two IgA subtypes. It has the ability to form multimers by interacting with the joining (J) chain.It is present in large quantities in blood. IgA antibodies protect mucosal surfaces against invading pathogens.
Specificity of the Alkaline Phosphatase Conjugated Anti-Human IgA is determined by Enzyme Linked Immunosorbent Assay (ELISA). Identity and purity of the antibody is established by immunoelectrophoresis (IEP) prior to conjugation. Electrophoresis of the antibody preparation followed by diffusion versus anti-goat IgG and anti-goat whole serum results in single arcs of precipitation.

Specificity

The conjugate is specific for human IgG. No cross-reaction with Mouse and Rat IgG.

Immunogen

Purified human IgA

Application

Human milk samples were analyzed for the presence of IgA antibodies specific to certain antigens of H. pylori by western blot using alkaline-phosphate-conjugated goat anti-human IgA antibody.
Anti-Human IgA (α-chain specific) Alkaline Phosphatase antibody produced in goat has been used in quantitative sandwich enzyme-linked immunosorbent assay (ELISA) and immunoassays.
The product may also be used for dot blot (1:30,000) and immunohistochemistry (at 1:100 dilutions, using formalin-fixed, paraffin-embedded sections).
Milk samples from 10 mothers were probed for bound milk IgA by western blot using alkaline-phosphatase goat anti-human IgA antibody.Elisa Assays were performed using alkaline phosphatase conjugated gaot anti-human IgA chain specific antibody (1:1000) to detect IgA immunoglobulins in serum and seminal plasma samples from infertile men.

Biochem/physiol Actions

Immunoglobulin A (IgA) antibody is a secretory antibody present abundantly in mucous linings of gastrointestinal, respiratory and genitourinary tracts, tears and saliva. Thus, secretory IgA contributes to the humoral defense mechanism against the pathogens on mucosal surfaces.
IgA is a secretory glycoprotein antibody that regulates the physiological balance between commensal intestinal bacteria and the defenses of the host immune system. It is the highest generated antibody isotype. IgAs are mainly secreted in the intestinal mucosa and prevent the commensal microorganisms from invading the intestines

Physical form

Solution in 0.05 M Tris, pH 8.0, containing 1% bovine serum albumin, 1 mM MgCl2 and 15 mM sodium azide

Storage and Stability

Store at 0-5°C. Do Not Freeze.

Disclaimer

Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

RIDADR

NONH for all modes of transport

WGK Germany

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

L R Stanberry et al.
Vaccine, 30(2), 307-316 (2011-11-15)
Improving the systemic and mucosal immune response following intranasal vaccination could enhance disease protection against respiratory pathogens. We assessed the safety and immunogenicity of a novel nanoemulsion mucosal adjuvant W(80)5EC combined with approved seasonal influenza antigens. This was a first-in-human...
Luka Mesin et al.
Journal of immunology (Baltimore, Md. : 1950), 187(6), 2867-2874 (2011-08-16)
To understand the biology of Ab-secreting cells in the human small intestine, we examined Ab production of intestinal biopsies kept in culture. We found sustained IgA and IgM secretion as well as viable IgA- or IgM-secreting cells after >4 wk...
Julian E Thomas et al.
Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 39(8), 1155-1160 (2004-10-16)
Immunoglobulin A (IgA) in maternal milk may protect Gambian infants from early Helicobacter pylori colonization. This study sought evidence that this protection could be due to specific IgA antibodies. Sixty-five infants were screened from 12 weeks of age with [13C]-urea...
Mucosal immunity and vaccines
Holmgren J and Czerkinsky C
Nature Medicine, 11(4s), S45-S45 (2005)
Mikael Sonesson et al.
European journal of oral sciences, 119(1), 15-20 (2011-01-20)
According to previous studies, minor glands produce about 35% of the total salivary immunoglobulin A (salivary IgA). The age-dependent increase in whole-saliva salivary IgA concentrations has been studied extensively, but we found no published reports comparing the minor-gland saliva concentrations...
Articles
Antibody-based serology tests are useful in identifying subjects with an adaptive immune response to the SARS-CoV-2 virus. Anti-human immunoglobulin antibodies allow for quick and simple, yet reliable assays with easy readouts and can also be adapted for high-throughput screening.
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