The challenges for CP in bioinformatics: a biochemist's perspective =================================================================== Ludwig Krippahl Abstract -------- The application of CP to bioinformatics has been an active field of research for nearly two decades. And, in this period, CP has proven to be a useful approach to problems ranging from sequence analysis through molecular structure to metabolic patwhays. And, yet, the penetration of CP methods in the bioinformatics community has been disproportionally modest. One important reason for this seems to be that the CP community, understandably, is focused mainly on the core issues of constraint programming, giving a lower priority to other aspects. Such as those implementation details that, though less innovative or meaningful in themselves, are nevertheless essential for any computational tool to be used. Or hybrid methods that complement the strengths, and overcome the weaknesses, of CP by combining it with other approaches, trading theoretical purity for functionality. In short, while CP researchers are naturally concerned mainly with CP research, biochemists are interested in bioinformatics as a tool for their own purposes. This gap is being bridged, but only slowly. This talk will present a brief overview of some achievements of CP in bioinformatics, proposing that high expectations for CP in this field are not unjustified, and give two examples that give an indication of what factors are most important for building CP tools based biochemists actually use. One is the application of CP to protein docking, and which was already used to model several protein complexes. The other example, far less successful, is the application of CP to processing of structural information and why it is still short of being useful despite the advantages that CP provides in this case.