Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Neighbor-joining tree of LDHB protein sequences from 85 isolates in the Daphnia pulex species complex. The number of sequences shared by multiple isolates of a particular species is given in brackets. C = North American D. pulicaria, X = North American D. pulex and CX = hybrid isolates. Other taxon codes are defined in Figure 3.
