Domain architecture of Gram-negative LTs. Domains were assigned based on consensus analysis of Pfam Database and NCBI conserved domain database. Protein name and locus tag are given for E. coli K12 (ECK…), P. aeruginosa PAO1 (PA…), S. maltophilia KJ (Smlt…), and N. gonorrhoeae FA1090 (NGO…). Locus tags are not given for Enteropathogenic E. coli (EPEC) or Rhodobacter sphaeroides (RS). For the bacteriophage LTs (family 1H and 4), the name of the infected host organism (ECK, PA, Smlt, and NG) and the identities of the bacteriophages encoding these LTs are provided. The PG_binding_1 domain of Family 1H and 3B is abbreviated as PG_b1. A color version of this figure is available at www.tandfonline.com/ibmg.