but your expected output is confusing:

I found that the expected output matches the description very well.

Should not the second line list the first occurrence of ubq?

no, because they both start with MA01001A1A03.f1

And what happened to DNA?
it starts with the same word as the third line.

In reply to Re^2: How to extract lines starting with new names/words by moritz
in thread How to extract lines starting with new names/words by sm2004

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