| http://www.w3.org/ns/prov#value | - Sample preparation for two-dimensional gel electrophoresis must include concentration and desalting steps such as precipitation and ultrafiltration due to the high amount of salts, sugars and lipids and the low total amount of protein of 0.3-0.7 microg/microl present in human CSF. Up to now we were able to identify more than 480 spots from suchlike generated 2D gels using MALDI- and ESI-mass spect
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