Multiple forms of immunoreactive dynorphin in human pituitary and pheochromocytoma |
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Authors: | T Suda F Tozawa S Tachibana H Demura K Shizume A Sasaki T Mouri Y Miura |
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Institution: | 1. Department of Medicine, Tokyo Women''s Medical College, 10-Kawada-Cho, Shinjuku-Ku, Tokyo, Japan;1. Research Laboratory of Biochemistry, Eisai Co., Ltd. 4-Koishikawa, Bunkyo-Ku, Tokyo, Japan;7. The Second Department of Medicine, Tohoku University School of Medicine, Sendai, Japan |
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Abstract: | Multiple forms of immunoreactive dynorphin (I-Dy) in human pituitary and pheochromocytoma were examined utilizing gel filtration and high performance liquid chromatography (HPLC). Gel filtration of I-Dy from these tissues revealed the major component in the position of Dy(1-17) and other minor components with large molecular weight forms. HPLC profile of this major component from gel filtration showed a large peak corresponding to the position of Dy(1-17) and small peaks corresponding to the positions of Dy (1-13), (1-12) and other unknown peptides. These results strongly suggest the presence of Dy(1-17) as the major component, and Dy (1-13), (1-12) or other unknown peptides as the minor components in these human tissues. |
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