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Unformatted text preview: smooth muscle.) Ethylene Gene Activity Ethylene activates a sequence of four proteins that ultimately promote transcription. In the absence of ethylene, its membrane receptor (A) located on the endoplasmic reticulum membrane phosphorylates a kinase (B) within the endoplasmic reticulum of the cell which blocks a second ER protein (C). In the presence of ethylene, its ER membrane protein (A) does not phosphorylate the internal ER protein (B), which results in phosphorylating the second ER membrane protein (C). The phosphorylation cascade activates protein (D), which moves into the nucleus activating appropriate transcription factors. Ethylene is the signal molecule for signal transduction pathways that activate a number of tissue growth and development activities throughout the plant, including fruit maturation, leaf abscission and senescence....
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This note was uploaded on 01/08/2012 for the course BIO 213 taught by Professor Makina during the Fall '09 term at SUNY Stony Brook.
- Fall '09