Transfer of proteins to membranes facilitates both cyanogen bromide cleavage and two-dimensional proteolytic mapping - PubMed (original) (raw)
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- PMID: 1688326
Transfer of proteins to membranes facilitates both cyanogen bromide cleavage and two-dimensional proteolytic mapping
K Luo et al. Oncogene. 1990 Jun.
Abstract
We have found that the transfer of gel-fractionated proteins to membranes facilitates phosphopeptide mapping. Nitrocellulose proves to be an excellent matrix for both cyanogen bromide cleavage and proteolytic digestion. Digestion of p56lck bound to a nitrocellulose membrane with cyanogen bromide or trypsin generated patterns of phosphopeptides indistinguishable from those produced by digestion of p56lck eluted from a gel. Immobilon-P and nylon membranes can also be used for proteolytic mapping, but not for cyanogen bromide cleavage. Since the use of membrane-bound protein eliminates the need for elution and precipitation of the protein, analysis is rapid. In addition, the recovery of the peptides from proteins digested on membranes is better and more consistent than it is from eluted and precipitated proteins.
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