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S1


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1. A soluble fragment of meromyosin.

2. A ribosomal protein, S1, that is involved in initiation of translation in E. coli.

3. S1 nuclease (EC 3.1.30.1, ~300 aa) is a fungal nuclease that degrades single-stranded nucleic acids and is preferentially active against DNA. Used experimentally to analyse the structure of DNA:RNA hybrids (S1 nuclease mapping, Berk–Sharp technique), and to remove single-stranded extensions from DNA to produce blunt ends (see restriction endonucleases).

Subjects: Medicine and Health.


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