The proteins of electrical tissue

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Abstract
The N-partition of Torpedo muscle and of 3 types of electrical tissue was detd. Quantitatively, the latter was characterised by a low total solid and low protein content; the total coagulable N was highest in Raia radiata, decreasing progressively in R. clavata and Torpedo, and the proportion of this N existing as globulin decreased in the same way. In Torpedo the extractable protein was almost entirely a P-containing mucin which was analysed and this was common to the other electrical tissues examined. Physico-chemical and quantitative data support the view that electrical tissue, while retaining the enzymes associated with the glycolytic system of muscle, differed mainly in the absence of myosin which was no longer necessary for contraction; the protein system was most dissimilar from muscle in those tissues which histologically were farthest removed from muscle (e.g., Torpedo) and most similar in incompletely metamorphosed tissue (e.g., R. radiata).