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Cold-adapted protease enables quantitation of surface proteins in the absence of membrane trafficking
Author(s) -
Faraz Ahmad,
Sarah K. Coleman,
Kai Kaila,
Peter Blaesse
Publication year - 2017
Publication title -
biotechniques
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.617
H-Index - 131
eISSN - 1940-9818
pISSN - 0736-6205
DOI - 10.2144/000114502
Subject(s) - biotinylation , protease , trypsin , cleavage (geology) , enzyme , membrane protein , biochemistry , membrane , chemistry , biology , microbiology and biotechnology , biophysics , paleontology , fracture (geology)
Protocol Summary We report here an improved method for analyzing protein surface expression utilizing a cold-adapted trypsin. Preservation of activity of the enzyme at 0–4°C permits modification of the protease method of surface analysis to temperatures at which trafficking of mammalian plasmalemmal proteins is blocked. This is an important advantage over established trypsin-cleavage protocols. Moreover, the method is less time-consuming than surface biotinylation.

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