I'll check this later. I have no experience with coronaviruses, but mainly influenza.
I already noticed, how close the envelope protein is and how distant
the spike protein. But is it unusual ?
South China Agricultural University claimed today they have a 99% matching pangolin sequence
to be published soon
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OK, I selected 65 Wuhan-close coronaviruses, spike=protein-area and made my mutation-picture:
http://magictour.free.fr/spike6j.GIFhttp://magictour.free.fr/spike6j.l2the ones close to each other in other areas are closer in the spike-area too -
that looks to me as if it were just mutating much more in that area -
rather than recombination.
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Pangolin paper from Sept.2019 :
https://www.mdpi.com/1999-4915/11/11/979/htm