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Orthomyxoviridae - Wikipedia, the free encyclopedia |
 | | There are some 500 distinct spike-like surface projections of the envelope each projecting 10 to 14 nm from the surface with some types (i.e. |
| | hemagglutininesterase (HEF)) densely dispersed over the surface, and with others (i.e. |
| | The major glycoprotein (HA) is interposed irregularly by clusters of neuraminidase (NA), with a ratio of HA to NA of about 4-5 to 1. |
| en.wikipedia.org /wiki/Influenza_virus (860 words) |
