World Wide Web Prediction Server
Center for Biological Sequence Analysis
More information about prokaryotic lipoproteins and their consensus sequence can be found in the PROSITE entry PROKAR_LIPOPROTEIN. Sequences may be scanned for the occurrence of PROSITE consensus patterns with the ScanProsite server.
Specifically, if SignalP predicts a eukaryotic signal peptide with a length over 30 residues, it might be uncleaved. See the page about identification of signal anchors.