Figure 4

Best scoring maximum likelihood phylogenetic analysis of serine/threonine protein kinase-like sequences. Midpoint rooted tree, with bootstrap values <50 removed. Scale bar indicates the branch length for 2.0 aa substitutions. CCA names are shown in bolded red and other noncalcifying red algae species are in blue. Incomplete sequences that were found within the enriched category but did not have serine/threonine protein kinase-like conserved regions are marked with a*.