Fig. 3. Phylogenetic relationships of K. marmoratus RhBG and
RhCGs and other homologues. Two major clusters are identified:
Cluster I (RhCG), Cluster II (RhBG). Cluster I is subdivided into Ia
(fish/amphibian/mammals/aves) and Ib (invertebrates). Cluster II is also
further divided into IIa (fish) and IIb (mammals/amphibian/aves). Sequences
are obtained from GenBank with accession numbers indicated.