Nucleotide Differences (IMAGE) Pensoft Publishers Caption This images shows nucleotide differences in a short non-coding region of plastid DNA, such as typically used in plant barcoding. The lower two species are closely related and only differ in the A (Adenine) in position 2 from the left, while the top species is more distantly related and shows numerous differences. Credit Susanne Renner Usage Restrictions This press release is available under the Creative Commons Attribution 3.0 License. It is expected to link back to the original article. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.