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Shizuka MIZUMACHI
Graduate School of Agriculture, Iwate University, Iwate 020-8550, Japan
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Taiki ARITOMI
Department of Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan
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Kuniaki SASAKI
Laboratory of Electron Microscope, Division of Technical Support, Iwate University, Iwate 020-8550, Japan
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Kazuei MATSUBARA
Graduate School of Agriculture, Iwate University, Iwate 020-8550, Japan
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Yuji HIRAO
Institute of Livestock and Grassland Science, NARO, Ibaraki 305-0901, Japan