Nowhere does the power of convergent evolution appear so insistently and compellingly, though, as in the structure of viral capsids, the self-assembling protein shells enclosing viral genomes. Though ranging in size from 20 nm to 800 nm, an estimated 70 percent of viral capsids known to date are icosahedral, shaped like tiny soccer balls.3
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1pub struct Cc {,推荐阅读超级权重获取更多信息