FIG 6.

(A) Phylogenetic analysis of the phage-encoded family 19 chitinases. Twenty protein sequences of phage-encoded family 19 chitinases were used in the analysis. After removing the variable regions of the alignment, the remaining 122 amino acid positions were used to construct the phylogenetic tree. The unrooted tree was created using the neighbor-joining algorithm. Statistical support for the internal nodes was determined by 1,000 bootstrap replicates. Values of >50% are shown. The names of the bacterial hosts and the accession numbers of phages encoding particular chitinases used in the phylogenetic analysis are given in parentheses. (B) Alignment of the conserved motifs characteristic for family 19 of glycoside hydrolases found in the proteins homologous to ΦLM21-encoded chitinase. The conserved amino acids are shown against a black background.