Hello, I am trying to make a figure like in this image. I have used Geneious but the resolution is very poor and not suitable for publication. I also tried Bio3d R-package. But could not get the desired output. Can anybody suggest how can I obtain such a figure? I could not find the proper function in bio3d package to get such a figure. Please give some suggestions.
Thank you.

![schematic of multiple sequence alignment][1]


  [1]: https://i.ibb.co/2Wnt934/Screen-Shot-2020-12-15-at-13-10-38.png
You can use `geom_tile` in R by assigning values to Reference and Alternate alleles (0 and 1 would work) Then plot it position on x axis and the alignment on Y axis. The rest is aesthetic settings. 