魚体表面の粘性物質に関する研究-II : マアナゴの体表面粘性物質の化学的性質

概要

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Our interest has been aroused by the fact that there are considerable dissimilarities in the external appearance among the external mucous substance of various species of fishes. The external mucous substances of loach and conger have a different appearance from each other, and these two kinds of fishes live in different conditions, that is, one in fresh water and the other in salt water. So, the external mucous substances of these fishes are assumed to have some chemical properties different from each other. In the present paper, with a view of elucidating the dissimilarity in the external appearance, the chemical properties of the external mucous substance of conger were studied, and compared with those of loach pre-viously reported by us1). While the 0.1% NaOH soluble matters of the external mucous substance of conger were very similar to those of loach with regard to protein precipitation and amino acid composition, the carbohydrate components of the former, having fucose instead of arabinose and no glucose, were different from those of the latter.