The early receptor potential (ERP) in the barnacle photoreceptor is shown by intracellular recording to exhibit a strong dependence on the color of the stimulus and of the preceding adaptation. The adaptation effects appear to be stable for at least 3 h in the dark. Most strikingly, the ERP is positive after red adaptation and mainly negative after blue adaptation. The simplest hypothesis which accounts for these observations is that two thermally stable pigment states with different absorption spectra contribute to the ERP. All ERP responses appear to be consistent with the sums of different ratios of the ERP's of the two pure states. The relative populations of the two states are shown to vary reciprocally, suggesting that the two are states of the same closed pigment cycle. Both states have approximately Dartnall nomogram-shaped absorption spectra, one peaked near 495 nm, and the other near 532 nm.
Article|
July 01 1973
Early Receptor Potential Evidence for the Existence of Two Thermally Stable States in the Barnacle Visual Pigment
B. Minke,
B. Minke
From The Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
Search for other works by this author on:
S. Hochstein,
S. Hochstein
From The Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
Search for other works by this author on:
P. Hillman
P. Hillman
From The Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
Search for other works by this author on:
B. Minke
From The Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
S. Hochstein
From The Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
P. Hillman
From The Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
Received:
April 17 1972
Online ISSN: 1540-7748
Print ISSN: 0022-1295
Copyright © 1973 by The Rockefeller University Press
1973
J Gen Physiol (1973) 62 (1): 87–104.
Article history
Received:
April 17 1972
Citation
B. Minke, S. Hochstein, P. Hillman; Early Receptor Potential Evidence for the Existence of Two Thermally Stable States in the Barnacle Visual Pigment . J Gen Physiol 1 July 1973; 62 (1): 87–104. doi: https://doi.org/10.1085/jgp.62.1.87
Download citation file: