Amplification of a 408-bp internal region of the cld gene using the UCD-238F/UCD-646R primer set. Lane 1, D. agitata; lane 2, “D. aromatica”; lane 3, M. magnetotacticum; lane 4, I. dechloratans; lane 5, Pseudomonas sp. strain PK; lane 6, D. suillum; lane 7, “D. chlorophilus”; lane 8, “D. anomalous”; lane 9, Dechloromonas species strain LT-1; lane 10, R. tenuis; lane 11, P. stutzeri; lane 12, Escherichia coli; lane 13, negative control (no DNA); lane 14, 100-bp ladder.