It is quite intriguing that most virus capsids are either icosahedral or helical in structure. Presumably, these two structures were the ideal structures to protect a viral genome and accessory proteins within a virus particle.elical Capsid. Helical capsids are usually formed from one protein that interlocks to form a helix-like structure around the viral genome. They are usually more common among viruses that infect plants, though influenza, measles, mumps and rabies viruses all have helical capsid structures.
1 RF modulator converts AV to RF channel.  Consumes 9 VDC input voltage and offers Antenna interfaces/ports for reliable transmission.
Use RF Modulators. Take one piece of coaxial cable and run it from your TV antenna or cable source into the Antenna In input on the back of the RF modulator. Take the second piece of coaxial cable and run it from the To TV output on the back of the RF Modulator to the cable/antenna in hookup on the TV.