Electron microscopic analysis of vibriophage N5 virion morphology and DNA structure. Panel A: Electron micrograph of vibriophage N5 stained with 2% uranyl acetate. Bar: 40 nm. Panel B: Electron micrograph of N5 DNA mounted on the grid by Kleinschmidt's technique. The arrows show the free ends of the DNA indicating that it is linear. Bar: 300 nm.