Figure 3.

Phylogenetic tree of the SC35 protein family. The phylogenetic tree was constructed on the basis of protein sequence alignments of the SC35 homologs in human, Drosophila, Arabidopsis and rice. The GenBank accession numbers for the sequences are as follows: hsSC35, Q01130; hsSRrp40, AAL57514; hsSRrp35: AAL57515; dmSC35, AAF53192; atSC35, NP_851261; atSR33/SCL33, NP_564685; atSCL30a, NP_187966; atSCL30, NP_567021; atSCL28, NP_197382; osSC35a, BAC79909; osSC35b, BAD09319; osSR33-1, AAP46199; osSCL30a/SR33-2, BAC799901; osSCL30-2, BAD19168. The sequences were aligned using CLUSTALW [22] with default parameters, and the phylogenetic tree was produced according to the neighbor-joining method using PAM substitution model distances as implemented in the PHYLIP package [103].