Gene Cluster Comparison Map. The relative positions of the orthologous gene clusters in Porphyromonas gingivalis and Chlamydia trachomatis are depicted. The blue line indicates the 5' to 3' direction. The purple line is directed 3' to 5'. The P. gingivalis genome is located above that of C.trachomatis. Genes are represented by small boxes that are positioned at each gene's start coordinate. Green lines connect orthologous pairs of genes that are oriented in the same direction. Red lines connect orthologous pairs of genes that are oriented in the opposite direction. This is a static map with no connection to our databases.