Abstract
The distribution of somatostatin immunoreactive forms in three tissues of the anglerfish (Lophius piscatorius L.) was analyzed by a combination of gel permeation, High Pressure Liquid Chromatography and amino acid analysis. The data indicate that prosomatostatins I and II are expressed in both neural and gastro-intestinal tissues and that their post-translational processing gives rise to somatostatin-14 I, somatostatin-28 II and to some of its hydroxylysine 23 -derivative, respectively. It is concluded that, in contrast to the mammals, production of two somatostatins in the Teleostean fish requires two structurally distinct precursors whose processing operates in a fixed pattern rather than in a tissue-specific manner.
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