Question (2034)
Question
How do you select sgRNAs for gene knock out and why do I need a set of 3 sgRNAs?
ABM community
Verified customer
Asked on Jan 29 2026
Answer
sgRNAs are primarily selected from widely trusted sources including Feng Zhang’s GEcKO v2 Knockout library or are designed using a variety of software to evaluate the best sgRNA targets including parameters such as high efficiency, minimal off targets and low self complementarity. We routinely find from in-house CRISPR knockout experiments that at least 1 out of 3 sgRNAs (from a set of 3 sgRNAs) results in successful gene knockout – this is why we always recommend choosing a set of 3 sgRNAs per gene.
ABM Scientific Support
Answered on Jan 29 2026