Extract list of genes that only appears in both List 1 and List 2

Question

[ahammedy02]

Hi all,

I have two lists of differentially expressed genes one from knockout A vs control and the other from knockout B vs control cells. However the list shows slightly different genes being expressed in KOA than KOB, as such I want to create a final list containing only those genes which appears in BOTH KOA and KOB but not mutually exclusive in either.

How would I go about this in R as I am completely lost.

Thanks, -Yaseen

[ATpoint]

intersect() maybe? Please show data.