All Photos(1)



Streptavidin−Alkaline Phosphatase from Streptomyces avidinii

lyophilized powder, ≥700 DEA units/mg protein

Streptavidin-AP, Streptavidin−AP from Streptomyces avidinii
MDL number:


alkaline phosphatase conjugate

Quality Level


lyophilized powder

specific activity

≥700 DEA units/mg protein


Protein, ≥40% biuret

storage temp.


Looking for similar products? Visit Product Comparison Guide

General description

Streptavidin, a 58 kDa protein, is a homotetramer purified from Streptomyces avidinii. It has a high affinity for biotin. Streptavidin has been conjugated with either peroxidase or alkaline phosphatase (ALP). These enzymes are used as protein conjugates because of their comparative stability and a wide range of suitable substrates for different applications. ALP conjugates to streptavidin in immunoassays.


The optimal working dilution should be determined empirically using a range of dilutions from a 1 mg/ml stock in buffer.
Streptavidin-alkaline phosphatase from Streptomyces avidinii has been used in enzyme-linked immune absorbent spot (ELISpot) to detect interferon (IFN-γ) producing cells.

Unit Definition

One alkaline phosphatase unit will hydrolyze 1.0 μmole of p-nitrophenyl phosphate per min at pH 9.8 at 37 °C.

Physical form

Lyophilized powder containing trehalose with EPPS, phosphate and traces of magnesium chloride and zinc chloride.


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.

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

Product Information Sheet


Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service