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.
OOOOHHH OOHHHHHH I know this one. Look on the back of your TV and look on the back of your DVD player. Chances are, they have different connections. An RF modulator is the go-between for your TV and DVD player. It accepts the coaxial cable from your TV and the RCA plugs from your DVD player. It does so much more and can be used in different applications, but this scenario covers 99% of the modulators uses.