唾液腺ホルモンの研究 (第15報)

馬耳下腺からパロチンの分離並びに牛-パロチンとの比較

抄録

Equine parotic gland is fairly different from bovine parotic gland, both in outward appearance and in properties. The pH 5.4-precipitate obtained from equine gland is larger in yield than that from bovine gland, but its effect is far weaker. The 12% (NH₄)₂SO₄-fraction, obtained by the purification of the equine pH 5.4-precipitate by fractional precipitation with ammonium sulfate, could not be induced to crystallize, remaining granular. The effect of this fraction is much weaker than the 12.1% (NH₄)₂SO₄-fraction from the bovine gland, and was found to be still rather impure from the results of electrophoretic analysis. The mobility of the active fraction obtained from the equine parotic gland is much larger than that of the active fraction from the bovine gland. The presence of a substance in the equine parotic gland which lowers the calcium level of rabbit serum is similar to the case in bovine gland, but its properties other than such physiological action, are slightly different from those of the bovine gland.