BioDraw Ultra makes drawing and annotating your biological pathways quick and straightforward, adding a level of uniformity and detail which is unmatched. Drawing elements include membranes, DNA, enzymes, receptors, and reaction arrows, tRNA, Ribosomes, Helix Proteins, Golgi Bodies, G-Proteins, Immunoglobins, Mitochondrion and a Plasmid Map Tool. BioDraw Ultra now includes a Sequence Tool for drawing peptide or nucleotide sequences using single letter codes. The sequences can be expanded and contracted. With BioDraw Ultra 12.0, you can also store annotations for each element in your drawing. Annotation data ranges from manually entered text to attached documents, literature references or links.