1: Li J, Fontaine-Rodriguez EC, Whelan SP. Amino acid residues within conserved domain VI of the vesicular stomatitis virus large polymerase protein essential for mRNA cap methyltransferase activity. J Virol. 2005 Nov;79(21):13373-84. PMID: 16227259 [PubMed - indexed for MEDLINE] 2: Griffiths E, Gupta RS. Protein signatures distinctive of chlamydial species: horizontal transfers of cell wall biosynthesis genes glmU from archaea to chlamydiae and murA between chlamydiae and Streptomyces. Microbiology. 2002 Aug;148(Pt 8):2541-9. PMID: 12177347 [PubMed - indexed for MEDLINE]