what is the strongest protein-protein interaction?

[Nick Theodorakis]

On Nov 16, 10:48 pm, "shifali  chatrath" <shifal... from rediffmail.com>
wrote:
>   
> HI!
> Avidin-Biotin interation is strongest known interaction till date. It has affinity constant of femtomolar range, followed by antigen antibody interaction which is of picomolar range on an average.
> You can try tagging protein A with Biotin and B with Avidin.It wont interfere with protein function if yours are plant proteins. Biotin is Vit.B2.
> hope it helps.
>


Biotin is not a protein, and the OP was looking for an epitope tag to
put on A. I don't know of an easy way to biotinylate one specific
protein during biosynthesis.

Also, vitamin B2 is riboflavin, not biotin.

Nick

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Nick Theodorakis
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