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Plant biotechnology is a dynamically developing science, which comprises many fields of knowledge. Novel plant genetic engineering findings highly influence the improvement of industrial production. These findings mostly concern cis-regulatory elements, which are sequences controlling gene expression at all developmental stages. They comprise of promoters, enhancers, insulators and silencers, which are used to construct synthetic expression cassettes. Examples of most important cis-regulatory elements are reviewed in the present paper. Variability among core promoters content and distal promoter regions impedes evaluation of interactions between them during the artificial promoters construction. Synthetic promoters and artificial expression cassettes trigger a significant increase in gene expression level, better properties and quality of a product. Accumulating knowledge about gene promoters, cis sequences and their cooperating factors allows uniform expression systems and highly predictable results.
Biłas et al. (Wed,) studied this question.