Very good review on Semantic Web technologies in the Life Sciences:
Interestingly they talk some on "Semantic Systems biology" as well, concluding that Systems biology has been predicted, and shown, to be one of the main adopters of semantic technologies within the life sciences, due to it's high need of integration of knowledge from diverse scientific fields.
Surprisingly they are not mentioning any of the projects of the BioModels initiative, of which I just blogged, such as the Systems Biology Ontology. Should be essential?!