Question (22047) | Anti-Strep-tag II antibody (ab76950)

Go to datasheet (ab76950)

Question

As following your data sheet, Immunogen: Amino acid sequence ASWSHPQFEKGA. He knows sequence of Strep-tag II is "WSHPQFEK". Does not matter different fragment of sequence?

Answer

We have two different versions of the tag: ab76950- against GGGWSHPQFEK ab76949- against ASWSHPQFEKGA Both contain the tag sequence WSHPQFEK along with extra inert amino acids to make the sequence longer for conjugation chemistry to the carrier protein and purification column. They should not interfere with antibody specificity, but if the customer is concerned, the immunogen for ab76950 would highlight the tag the most.

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