Identification and determination of urinary acetylpolyamines in cancer patients by electrospray ionization and time-of-flight mass spectrometry
Samejima, Keijiro, Hiramatsu, Kyoko, Takahashi, Keiichi, Kawakita, Masao, Kobayashi, Masaki, Tsumoto, Hiroki, Kohda, Kohfuku
Published in Analytical biochemistry (01.06.2010)
Published in Analytical biochemistry (01.06.2010)
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Journal Article
Crystal Structures and Enzymatic Properties of a Triamine/Agmatine Aminopropyltransferase from Thermus thermophilus
Ohnuma, Mio, Ganbe, Tadashi, Terui, Yusuke, Niitsu, Masaru, Sato, Takao, Tanaka, Nobuo, Tamakoshi, Masatada, Samejima, Keijiro, Kumasaka, Takashi, Oshima, Tairo
Published in Journal of molecular biology (20.05.2011)
Published in Journal of molecular biology (20.05.2011)
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Journal Article
Pentamines as Substrate for Human Spermine Oxidase
Takao, Koichi, Shirahata, Akira, Samejima, Keijiro, Casero, Robert Anthony, Jr, Igarashi, Kazuei, Sugita, Yoshiaki
Published in Biological & pharmaceutical bulletin (01.03.2013)
Published in Biological & pharmaceutical bulletin (01.03.2013)
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Journal Article
Development of Irreversible Inactivators of Spermine Oxidase and N1-Acetylpolyamine Oxidase
Moriya, Shun-suke, Miura, Toshiyuki, Takao, Koichi, Sugita, Yoshiaki, Samejima, Keijiro, Hiramatsu, Kyoko, Kawakita, Masao
Published in Biological & pharmaceutical bulletin (2014)
Published in Biological & pharmaceutical bulletin (2014)
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Journal Article
Increase of N 1 ,N 12-diacetylspermine in tissues from colorectal cancer and its liver metastasis
Kuwata, Go, Hiramatsu, Kyoko, Samejima, Keijiro, Iwasaki, Kaori, Takahashi, Kei-ichi, Koizumi, Koichi, Horiguchi, Shin-ichiro, Moriya, Shun-suke, Kobayashi, Masaki, Kawakita, Masao
Published in Journal of cancer research and clinical oncology (01.06.2013)
Published in Journal of cancer research and clinical oncology (01.06.2013)
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Journal Article
Pentamines as Substrate for Human Spermine Oxidase
Koichi Takao, Akira Shirahata, Keijiro Samejima, Robert Anthony Casero Jr, Kazuei Igarashi, Yoshiaki Sugita
Published in Biological and Pharmaceutical Bulletin (01.03.2013)
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Published in Biological and Pharmaceutical Bulletin (01.03.2013)
Journal Article
Electrospray Ionization and Time-of-Flight Mass Spectrometric Method for Simultaneous Determination of Spermidine and Spermine
Samejima, Keijiro, Otani, Masahiro, Murakami, Yasuko, Oka, Takami, Kasai, Misao, Tsumoto, Hiroki, Kohda, Kohfuku
Published in Biological & Pharmaceutical Bulletin (01.10.2007)
Published in Biological & Pharmaceutical Bulletin (01.10.2007)
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Journal Article
Chemical derivatization of peptides containing phosphorylated serine/threonine for efficient ionization and quantification in matrix-assisted laser desorption/ionization time-of-flight mass spectrometry
Tsumoto, Hiroki, Ra, Moonjin, Samejima, Keijiro, Taguchi, Ryo, Kohda, Kohfuku
Published in Rapid communications in mass spectrometry (15.04.2008)
Published in Rapid communications in mass spectrometry (15.04.2008)
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Journal Article
Formation of Spermidine or Norspermidine from Synthetic Diacetylpolyamines by Acetylpolyamine Oxidase in Cultured Cells
Takao, Koichi, Ozawa, Tomohiro, Shibata, Satoko, Wada, Makiko, Sugita, Yoshiaki, Shirahata, Akira, Samejima, Keijiro
Published in Biological & Pharmaceutical Bulletin (01.12.2007)
Published in Biological & Pharmaceutical Bulletin (01.12.2007)
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Journal Article
Spermidine Regulates Insulin Synthesis and Cytoplasmic Ca2+ in Mouse Beta-TC6 Insulinoma Cells
Ohtani, Masahiro, Mizuno, Ikuko, Kojima, Yumiko, Ishikawa, Yuichi, Sodeno, Midori, Asakura, Yuka, Samejima, Keijiro, Oka, Takami
Published in Cell Structure and Function (01.01.2009)
Published in Cell Structure and Function (01.01.2009)
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Journal Article
A conceptual model of the polyamine binding site of N 1-acetylpolyamine oxidase developed from a study of polyamine derivatives
Takao, Koichi, Shibata, Satoko, Ozawa, Tomohiro, Wada, Makiko, Sugitia, Yoshiaki, Samejima, Keijiro, Shirahata, Akira
Published in Amino acids (01.07.2009)
Published in Amino acids (01.07.2009)
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Journal Article
Mammalian Spermidine Synthase—Identification of Cysteine Residues and Investigation of the Putrescine Binding Site
Goda, Hitomi, Watanabe, Toshiko, Takeda, Noboru, Kobayashi, Masaki, Wada, Makiko, Hosoda, Harumi, Shirahata, Akira, Samejima, Keijiro
Published in Biological & Pharmaceutical Bulletin (01.09.2004)
Published in Biological & Pharmaceutical Bulletin (01.09.2004)
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Journal Article
Control of Spermidine and Spermine Levels in Rat Tissues by trans-4-Methylcyclohexylamine, a Spermidine-Synthase Inhibitor
Kobayashi, Masaki, Watanabe, Toshiko, Xu, Yong Ji, Tatemori, Minoru, Goda, Hitomi, Niitsu, Masaru, Shirahata, Akira, Samejima, Keijiro
Published in Biological & Pharmaceutical Bulletin (01.04.2005)
Published in Biological & Pharmaceutical Bulletin (01.04.2005)
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Journal Article
N1-Aminopropylagmatine, a New Polyamine Produced as a Key Intermediate in Polyamine Biosynthesis of an Extreme Thermophile, Thermus thermophilus
Ohnuma, Mio, Terui, Yusuke, Tamakoshi, Masatada, Mitome, Hidemichi, Niitsu, Masaru, Samejima, Keijiro, Kawashima, Etsuko, Oshima, Tairo
Published in The Journal of biological chemistry (26.08.2005)
Published in The Journal of biological chemistry (26.08.2005)
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Journal Article