Figure 7From: AZT resistance alters enzymatic properties and creates an ATP-binding site in SFVmac reverse transcriptase Localization of tryptophan residues in RTshort mt4 . A structure homology model was generated based on the structure of XMRV RT (PDB: 4HKQ) using the Program SWISS-MODEL. Color coding is analogous to Figure 1. The Trp residues are highlighted in purple. (A) Ribbon diagram and (B) space filling representation of the fingers and palm subdomains of mt4.Back to article page