The BR is biosynthesised from campesterol . The biosynthetic pathway was elucidated by Japanese researchers and later shown to be correct through the analysis of BR biosynthesis mutants in Arabidopsis , tomatoes and peas. [ 5 ] The sites for BR synthesis in plants have not been experimentally demonstrated. One well-supported hypothesis is that all tissues produce BRs, since BR biosynthetic and signal transduction genes are expressed in a wide range of plant organs, and short distance activity of the hormones also supports this. [ 6 ] [ 7 ] Experiments have shown that long distance transport is possible and that flow is in an acropetal direction, but it is not known if this movement is biologically relevant. [ 6 ] Brassinosteroids are recognized at the cell membrane, although they are membrane soluble.
This entry describes 1 <p> This subsection of the ‘Sequence’ section lists the alternative protein sequences (isoforms) that can be generated from the same gene by a single or by the combination of up to four biological events (alternative promoter usage, alternative splicing, alternative initiation and ribosomal frameshifting). Additionally, this section gives relevant information on each alternative protein isoform.<p> <a href='/help/alternative_products' target='_top'> More...</a> </p> isoform i produced by alternative splicing . Align Add to basket Added to basket