How to interlace pair-end reads via seqtk and make the headers end in /1 and /2 corresponding to its read orientation (R1 and R2, respectively)?

[yoyohashao]

Hello, sorry for the empty previous post cuz I tapped Enter key so fast...
I am preparing datasets for kmernorm which requires the files look like
@seq_1/1
AAAAAAAACCCCCCCTTTTTTTTTGGGGGGGG
+
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
@seq_1/2
AAAAAAAACCCCCCCTTTTTTTTTGGGGGGGG
+
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
@seq_2/1
AAAAAAAACCCCCCCTTTTTTTTTGGGGGGGG
+
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
@seq_2/2
AAAAAAAACCCCCCCTTTTTTTTTGGGGGGGG
+
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&

And a bioinformatician told me seqtk could archive this. But after screening the examples of seqtk, I didn't find the command. Could someone tell me how to do this in seqtk? Many thanks!

[tseemann]

To interleave PE reads do this:

seqtk mergepe R1.fq,gz R2.fq.gz | gzip > Interleaved.fq.gz