| 摘要 |
The present invention provides for various processes for determining enzyme activity. In one embodiment, a process for detecting an enzyme activity includes contacting a blood component with a substrate comprising a cleavage site of the enzyme and a tag moiety to produce a sample comprising a cleavage product having a known mass, and placing the sample in contact with a SELDI sample chip which has surface moieties which bind to the cleavage product. In another embodiment, the process further includes subjecting the SELDI sample chip to SELDI mass spectrometry to identify the cleavage product. The present invention also provides for a kit which includes a SELDI sample chip having surface moieties capable of binding to an enzyme cleavage product.
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