Does genome-wide analysis of ABA-responsive elements ABRE and CE3 reveal divergent patterns in Arabidopsis and rice?
Our computational analyses revealed distinct recruitment patterns of ABA-responsive CREs in upstream sequences of Arabidopsis and rice. The apparent absence of CE3s in Arabidopsis suggests that another CE pairs with ABRE to establish a functional ABRC capable of interacting with transcription factors. Further studies will be needed to test whether the observed differences are extrapolatable to monocots and dicots in general, and to understand how they contribute to the fine-tuning of the hormonal response. The outcome of our investigation can now be used to direct future experimentation designed to further dissect the ABA-dependent regulatory networks.
The 13A antigen is an integral membrane protein of several rat epithelial tissues and cultured cells, and is particularly abundant in the podocyte foot processes. Although its identity and function remain unknown, the 13A protein is a valuable marker for the basal membrane domain of the podocyte.