You might find this interesting:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7033698/#!po=22.7273
“Sequences that completely match the insertion 3 and 4 sequences were not found in any HIV-1 sequences. This clearly shows that these insertion sequences are widely present in living organisms including viruses, but not HIV-1 specific. All these regions in HIV-1 envelope glycoprotein are highly variable with many large insertions and deletions, indicating that they are not essential for biological functions of HIV-1 envelope glycoprotein.
(snip)
Second, these insertions are present not only in 2019-nCoV viruses but also in three betaCoV sequences from bats: two (ZC45 and ZXC21) from Zhejiang deposited in GenBank in 2018 and RaTG13 from Yunnan obtained in 2013 [8]. The RaTG13 is much more similar to 2019-nCoV than both ZC45 and ZXC21 (Figure 1A). The similarity of the spike protein between RaTG13 and 2019-nCoV is 97.7%.”
Above already posted here:
https://freerepublic.com/focus/chat/3983555/posts?page=63#63