1. Institute of Biochemical Physics, Russian Academy of Sciences, Vavilov St. 28, 117813 Moscow GSP-1, Russia; Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Av. 37, 117913 Moscow, Russia; Physics Department, Moscow State University, 117234 Moscow, Russia; and NIZO Food Research, Kernhemseweg 2, NL-6718, Ede, The Netherlands