Echinochrome

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Abstract
Echinochrome can be isolated from eggs and perivisceral fluid of Arbacia punctulata. It does not form a dissociable compound with 0, but is the oxidant of an oxidation-reduction system. Electrode potentials have been measured over a range of pH 25-9.76. Normal electrode potential is +0.1995. If echinochrome has any respiratory function, it is an activator rather than a carrier of 0. From the electrode aquation E[eta]=Eo[image][long dash]0.03006 log [Sr]/[S0] at reduction intensities of less than th 7, it would appear that enough reduced pigment is present to be important in cell oxidations, even though the quantity is analytically insignificant.

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