Toolyard

NsiI Recognition Site


NsiI at a glance

5' ATGCA|T 3'
3' T|ACGTA 5'
Recognition site5'-ATGCAT-3'
CutATGCA^T
Endsa 4-base 3' overhang (TGCA)
Expected frequencyabout once every 4,096 bp in random DNA
Compatible endsPstI

How to find NsiI sites in a sequence

  1. Paste a DNA sequence or FASTA record into the box above. NsiI is already entered under Only these enzymes.
  2. Tick Circular DNA for a plasmid, so a site that spans the end and the start is found.
  3. The map marks each NsiI cut with its position. Copy or download the output below it.

Frequently asked questions

What sequence does NsiI cut?

NsiI recognizes ATGCAT (written 5' to 3') and cuts the top strand at ATGCA^T.

Does NsiI leave sticky or blunt ends?

Sticky ends: a 4-base 3' overhang (TGCA).

Which enzymes leave ends compatible with NsiI?

PstI. Their overhangs are the same, so the ends can be ligated to each other.

How often does NsiI cut?

A site like ATGCAT turns up about once every 4,096 bp in random DNA. Real sequences vary, so check yours above.

Restriction enzymes

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