Phylogenetic analysis of green like cbbL clones. Neighbour-joining tree (Jukes–Cantor correction) was constructed from saline soil (SS2) clone library partial cbbL (form IA) nucleic acid sequences (phylotypes) with closely related cbbL-gene sequences from known organisms and environmental clones. Clone sequences of form IA cbbL sequence are coded as ‘RG’. One representative phylotype is shown followed by phylotype number and the number of clones within each phylotype is shown at the end. One thousand bootstrap analyses were performed and percentages are shown at nodes. The scale bar indicates 0.05 substitutions per site. The red-like cbbL sequence of Xanthobacter autotrophicus was used as outgroup for tree calculations.