What is meant by star activity with respect to a restriction

What is meant by \"star activity\" with respect to a restriction enzyme.

I just need a 1-2 sentence explanation

Solution

1. Star activity is a general property of Restriction endonuclease.

2. During some non-standard reaction conitions, specific restriction enzymes are can cleave the sequences which are similar , but not identical ,to their efined recognition seqences.

3.Such kind of soecificity has been calle \" Star activity\".