The invention relates to nucleic acid sequences isolated from sugarcane and to methods of using them. In particular, the inventions relates to nucleotide sequences which are derived from sugarcane polyubiquitin genes and which are capable of directing constitutive expression of a nucleic acid sequence...http://www.google.com/patents/US6638766?utm_source=gb-gplus-sharePatent US6638766 - Promoter of the sugarcane UBI4 gene
