1. TÜBİTAK Marmara Research Center, Food Institute, P.O. Box 21, 41470 Gebze-Kocaeli, Turkey, Division of Food Science, Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, ul. Tuwima 10, 10-718 Olsztyn-Kortowo, Poland, and Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL A1B 3X9, Canada