Figure 2From: Novel sequences of subgroup J avian leukosis viruses associated with hemangioma in Chinese layer hensComparision of transcriptional regulatory elements in the U3 region of reference strains. Shown are the sequences of U3 from HPRS-103 [5]. Sequences identical to HPRS-103 are showed as dot (.) and the deletions are represented by dashes (-).The 19 bp novel insertion in the three isolates is marked and transcriptional regulatory elements in U3 area are boxedBack to article page