DNA mutation annotation

I am working on MT DNA and trying to decipher the MT phylotree17. I understand 1234G means there is a Ref => G mutation. But what does 1234.XC mean? What does 1234G! (an extra '!') mean?

Thanks in advance!

snp genome sequencing gene

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updated 6.9 years ago by Biostar 380 • | written 7.1 years ago by dr.genetics 6

What is the source of the data?

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written 7.0 years ago by Kevin Blighe 9.0K

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