Protein A beads
Protein A beads can mainly immobilize antibodies (IgG) on beads by affinity purification.
It can be used for antibody purification and immunoprecipitation experiments using antigen-antibody reaction.
Protein A is a protein derived from the cell wall of Staphylococcus aureus (S. aureus).
The product lineup includes regular FG beads and highly magnetically responsive HM beads.
|Beads||FG beads||HM beads
（High Magnetic Response Type）
|Price||Please contact us|
|Storage conditions||2-8 ℃ (no freezing)|
|Storage buffer||10 mM HEPES(pH7.9), 50 mM KCl,
1 mM EDTA, 10% glycerol
|10 mM HEPES(pH7.9)|
|Magnetization||Superparamagnetism (≧10 emu/g)||Superparamagnetism (≧20 emu/g)|
|Size of beads||180±30 nm||140±20 nm|
|Functional groups||Protein A|
|Binding ability||≧35 ug Human IgG/mg of beads|
Binding properties of Protein A and Protein G to IgG
※Please scroll horizontally.
|Animal species||Goat||Guinea pig||Dog||Cat||Hamster||Sheep||Pig|
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- Please tell me how to separate FG beads (magnetic separation and centrifugation).
- Please tell me how to disperse FG beads (ultrasonic method and manual method).
- I mistakenly frozen some beads that were supposed to be stored in the refrigerator. Is it available?
- How is the cell extract prepared?
- Is there any problem with using frozen stock homogenate?
- How much protein supply is necessary?
- There are many background bands. how can i reduce it?
- What should be done when a large number of bound protein bands are detected?
- Is it necessary to use the recommended buffer as the binding buffer?
- Does it happen that the band of bound protein becomes thin when the concentration of ligand is increased?
- Why can’t I see any bands of bound proteins?
- How long is the stable period of the ligand-immobilized beads?
- What is the optimal bead type for immobiliding antibodies?
- Can I quantify the immobilization amount of the antibodies on the beads?
- What is the efficiency when immobiliding antibodies?
- Is there a way to increase the antibody immobilization efficiency (immobilization amount)?
- Can I disperse antibody-immobilized beads by ultrasonic device?
- When immobilizing antibodies to beads, the beads may adhere to the wall of the tube. Is there a way to suppress this?
- How can I improve dispersibility of antibodies immobilized beads?
- I want to analyze bound proteins with MS, but what should I do if the target protein band is thin?
- How much protein can be analyzed by MS?