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Protein G, Alkaline Phosphatase Conjugate



Quality Level


≤0.1% sodium azide as preservative



storage condition

do not freeze

shipped in

wet ice

storage temp.


General description

Protein G, Alkaline Phosphatase Conjugate is obtained by conjugation of protein G, a cell-surface protein of Streptococcus species to alkaline phosphatase. This conjugate is used as a secondary agent in immunoassay methods to detect polyclonal goat and rabbit antibodies and monoclonal mouse IgG1, IgG2a, and IgG2b.
Protein G conjugated to alkaline phosphatase. Does not react with IgA, IgE, or IgM.


Protein G, Alkaline Phosphatase Conjugate has been used in:
  • direct enzyme-linked immunosorbent assay (ELISA) (1:1000)(1:250)
  • indirect ELISA (1:1000)
  • immunoblot (1:5000)


500 μg in Plastic ampoule
Please refer to vial label for lot-specific concentration.


Toxicity: Standard Handling (A)

Physical form

In 50 mM Tris buffer, 1 mM MgCl₂, 0.1 mM ZnCl₂, 1% BSA, 0.1% sodium azide, pH 7.6.

Analysis Note

Single band at 33.8 kDa by SDS-PAGE

Other Notes

p-Nitrophenyl phosphate, 1.0 mg/ml in 10% diethanolamine, pH 9.8, 1 mM MgCl2 at 25°C, was used as substrate to test immunoenzyme reactivity. Variables associated with assay conditions will dictate the proper working dilution.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

11 - Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

A O Olarinmoye et al.
Epidemiology and infection, 145(10), 2030-2037 (2017-05-10)
The hamadryas baboon (Papio hamadryas hamadryas) is the only indigenous species of non-human primates (NHP) found in the Kingdom of Saudi Arabia (KSA). There are no peer-reviewed publications on viral infections of the baboons of KSA. Apart from camels, other...
S Sun et al.
Journal of immunological methods, 152(1), 43-48 (1992-07-31)
The IgG binding domains of staphylococcal protein A and streptococcal protein G were expressed as a chimaera using the pGEX vector which has been advocated because its fusion proteins tend to be soluble and easily isolated on immobilised glutathione. This...
Anja Reckendorf et al.
International journal for parasitology. Parasites and wildlife, 14, 53-61 (2021-01-26)
Pseudaliid lungworm (Metastrongyloidea) infections and associated secondary bacterial infections may severely affect the health status of harbour porpoises (Phocoena phocoena) in German waters. The presented retrospective analysis including data from 259 harbour porpoises stranded between 2006 and 2018 on the...
B Nilson et al.
Journal of immunoassay, 9(2), 207-225 (1988-01-01)
Protein G, an IgG-binding protein, purified from the surface of group G streptococci, was coupled to alkaline phosphatase. The conjugate was used for detection of polyclonal goat and rabbit antibodies and monoclonal mouse IgG1, IgG2a and IgG2b in an enzyme-linked...
B N Ogunro et al.
Journal of epidemiology and global health, 8(3-4), 162-170 (2019-03-14)
Ebola viruses (family: Filoviridae) are the cause of Ebola virus disease (EVD), a highly fatal illness characterised by haemorrhagic fever syndrome in both humans and non-human primates (NHPs). West Africa was the epicentre of the 2013-2015 EVD epidemic which caused...

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