Abstract
Proteins extracted from murine B-lymphocytes after in vitro stimulation by lipopolysaccharide were separated by two-dimensional (2-D) polyacrylamide gel electrophoresis and analyzed by matrix assisted laser desorption/ionization mass spectrometry. Structural information on the protein entities from 153 spots was obtained. Since many of these spots occur as members of spot families, a smaller number --98 genes-- was found to be coding for the identified spots. The elucidated proteins belong to groups of functional categories; we found 26 enzymes, 36 regulatory proteins, 15 chaperones, 15 structural proteins, 4 immunoglobulins, 1 ribosomal and 1 histone protein. A comparison between expected and observed molecular masses yields a good correlation for the majority of the compared spot entities. This set of proteins now identified in the context of a lymphocyte 2-D gel pattern should advance further studies on lymphocyte functions.
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