Abstract: The present invention relates to the cryptophane derivatives of formula (I) capable of encapsulating small molecules such as noble gases for biological and environmental use. In particular, the invention relates to cryptophane derivatives with high affinity for xenon, which can be used as biosensors in clinical imaging.

Abstract: Epstein-Barr virus (EBV) specific polypeptides consisting of a series of one to 1000 peptide units selected from the group consisting of peptide units ?, ?, ? and ?, wherein ? is 25 amino acids or less and has the formula (?ETFTETWNRFITHTE?) (SEQ ID NO:1), ? is 25 amino acids or less and has the formula (?GMLEASEGLDGWIHQ?) (SEQ ID NO:2), ? is 25 amino acids or less and has the formula (?HQQGGWSTLIEDNI?) (SEQ ID NO:3), ? is 25 amino acids or less and has the formula (?KQKHPKKVKQAFNPL?) (SEQ ID NO:4), ? and ? are each independently from 0 to 5 naturally occurring amino acids, and the polypeptide is capable of binding antibody in a specimen from an individual with Epstein-Barr virus (EBV)-associated disease are disclosed. Also disclosed are the use of these polypeptides for the production of polypeptide-specific antibodies and the diagnosis and treatment of EBV-associated disease.