Related Experiment Video
Updated: Aug 2, 2026

Gene Expression Profiling of Infecting Microbes Using a Digital Bar-coding Platform
Published on: January 13, 2016
Individual Members of the Cab Gene Family Differ Widely in Fluence Response
M. J. White1, L. S. Kaufman, B. A. Horwitz
1Department of Biology, Saint Mary's University, Halifax, Nova Scotia, B3H 3C3 Canada (M.J.W.).
Abstract:
Chlorophyll a/b-binding protein genes (Cab genes) can be extremely sensitive to light. Transcript accumulation following a red light pulse increases with fluence over 8 orders of magnitude (L.S. Kaufman, W.F. Thompson, W.R. Briggs [1984] Science 226: 1447-1449). We have constructed fluence-response curves for individual Cab genes. At least two Cab genes (Cab-8 and AB96) show a very low fluence response to a single red light pulse. In contrast, two other Cab genes (AB80 and AB66) fail to produce detectable transcript following a single pulse of either red or blue light but are expressed in continuous red light. Thus, very low fluence responses and high irradiance responses occur in the same gene family.
Related Concept Videos
Cell Specific Gene Expression
Combinatorial Gene Control
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
General Transcription Factors
Cell Specific Gene Expression
Diversity in Cell Signaling Responses
Graded and Abrupt Responses
Some signaling systems generate...
Constitutive and Regulated Gene Expression

