Corrections and clarifications.
In the report "Activation and regeneration of rhodopsin in the insect visual cycle" by A. Kiselev and S. Subramaniam (25 Nov., p. 1369), the second and third sentences of the last paragraph on page 1371 were incorrectly printed. They should have read, "When rhodopsin was re-excited immediately after it was regenerated, most of the metarhodopsin formed was thermally stable (that is, M(b) was formed predominantly; Fig. 4A). However, when rhodopsin was re-examined after waiting for various lengths of time (in the dark), an exponential increase was observed in the amount of thermally unstable metarhodopsin produced, implying heterogeneity in the rhodopsin population."