Figure 2
Molecular phylogenetic tree of the ghrelin receptor (GHS-R1a) in mammals. The phylogenetic tree of amino acid (AA) sequences
was constructed by using the neighbor-joining (NJ) method with MEGA4 Software (http://www.megasoftware.net/). The numbers on the branch points are the bootstrap values (as percentages based on 1000 replicates). AA sequences obtained
from the Ensembl Genome Browser (http://www.ensembl.org/index.html). GeneID shows the following species name. Receptors for human motilin (MLNR), neuromedin-U (NMUR1), and neurotensin (NTSR1)
were used as the out group. Symbols are defined as follows: closed circle, Euarchontoglires; open square, Afrotheria; asterisk,
Marsupialia; open down triangle, Laurasiatheria.