Figure 2From: The deletion of an extra six nucleotides in the 5′ -untranslated region of the nucleoprotein gene of Newcastle disease virus NA-1 decreases virulenceF segment from NA-1 and rNA-1 viruses. Lane 1: marker, lane 2: F segment from NA-1 virus cloned into pMD18-T vector, lane 3: NA-1 F segment digested by RsrII, Lane 4: F segment from rNA-1 virus cloned into pMD18-T vector, lane 5: F segment from rNA-1 digested by RsrII.Back to article page