Genetic and functional diversity of β-N-acetylgalactosamine-targeting glycosidases expanded by deep-sea metagenome analysis oleh Tomomi Sumida, Satoshi Hiraoka, Keiko Usui, Akihiro Ishiwata, Toru Sengoku, Keith A. Stubbs, Katsunori Tanaka, Shigeru Deguchi, Shinya Fushinobu, Takuro Nunoura