Ethidium-bromide gel electrophoresis analysis of subgenomic H-gene RT-PCR amplicons. For CDV-2676, shown are the 1104 bp product (lane 1) using primers CDV-HforD and CDV-Hrev75, and the 1026 bo product (lane 2) using primers CDVH-forB and CDV-HrevC (29). A 2% agarose gel was used. Molecular weight markers are loaded in the lane marked "M". Positive and negative controls were run separately and are not shown.