The exact sequences of viral capsid proteins may vary widely, consistent with the “local” contingency of the evolutionary process. But even with this divergence, the tertiary and quaternary structures of capsid proteins and capsid structures of myriad viruses are remarkably similar, illustrating the “global” predictability of evolution. This predictability may be particularly defensible in the case of viruses, since they represent life stripped to the essentials of replication and assembly, and evolving under extreme geometric and genomic constraints.
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marking features that are coming (or already available on the,更多细节参见今日热点