Hi AnomalousMonk,
Awoshhh!!. My bad! You are right. I think I read wrong, the OP requirement. I think, rnaeye has a better implementation of that.

If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me

In reply to Re^3: merge sequences with new sequence insertion by 2teez
in thread merge sequences with new sequence insertion by utpalmtbi

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