User talk:Eman AlaliSandbox 1: Difference between revisions

The influenza virus is a common virus found in many places around the world and comes in three different subtypes A,B, and C. Influenza A subtype is the most infectious subtype. It causes pandemics with significant mortalities in affected young people for that it has a wide host range including human, pigs, horses, and birds. All the three influenza subtypes contains the same segmental genome and enveloped glycoprotein. The virus is spherically shaped, ranging from 80 to 120 nm in diameter. The viral particles contain 3 proteins on their outer surface, called: H, N, and M2. It also contains a matrix protein M1 below the outer surface. Each protein has a different function that helps the virus to penetrate and enter the animal’s host cell. The virus also contains eight segments of single stranded negative polarity RNA. Once the virus infects the cell, it will travel to the nucleus to replicate its genome, then the viral mRNA will transfer to the cytoplasm to be translated into viral proteins. Once all the viral proteins are formed, they will all aggregate and get released from the host cell (Shors, 2013).

== Hemagglutinin (H) protein ==