Biophysical Journal 9: 845-859 (1969)
© 1969 the Biophysical Society

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Computer Assisted Analysis of S-Potentials

ABSTRACT

S-potentials from the channel catfish were analyzed using a high speed biological data processing system developed at this Institute. The analysis has shown that, when moderately dark adapted, the relation between the (maximal) amplitude of S-potential and log intensity of flash was the hyperbolic tangent throughout the whole visible spectrum. This is what one could expect if the S-potential in the fish was generated by signals from a single class of pigment and each signal had discrete action on the S-potential generating mechanism. The maximal absorption of the pigment involved was at around 625 nm.

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