Molecular (sub-)structures responsible for interaction with electromagnetic radiation are called chromophores. 

TLS Online TPP Program

#Id: 2616

#Unit 13. Methods in Biology

Type I restriction endonucleases are complex endonucleases and have recognition sequences of about 15 bp; 

TLS Online TPP Program

#Id: 2617

#Unit 13. Methods in Biology

Type I restriction endonucleases cleave the DNA about 1000 bp away from the 5'-end of the sequence "TCA" located within the recognition site.

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#Id: 2618

#Unit 13. Methods in Biology

Type II restriction endonucleases are remarkably stable and induce cleavage either, in most cases, within or immediately outside their recognition sequences.

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#Id: 2619

#Unit 13. Methods in Biology

More than 350 different type II endonucleases with over 100 different recognition sequences are known.

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#Id: 2620

#Unit 13. Methods in Biology

Some restriction endonucleases and their recognition sites.

TLS Online TPP Program

#Id: 2621

#Unit 13. Methods in Biology

Examples of restriction endonuclease nomenclature.