On sequence diagrams, this numbering is somewhat redundant because the ordering of the messages always is determined by the order, from top to bottom, in which they appear on the diagram.

Tree diagrams could display mutations by using either the profile ... in 1999. This reference sequence is a convenient device for recording mtDNA ... Med. Genet. Part B. 159B, 414–421 ...

Roche announced that a consortium consisting of researchers from Penn State University, the National Center for Biotechnology Information, Children’s Hospital Oakland Research Institute and Roche 454 ...