Convert msa file/object to tidy data frame.
tidy_msa(msa, start = NULL, end = NULL)
multiple sequence alignment file or sequence object in DNAStringSet, RNAStringSet, AAStringSet, BStringSet, DNAMultipleAlignment, RNAMultipleAlignment, AAMultipleAlignment, DNAbin or AAbin
start position to extract subset of alignment
end position to extract subset of alignemnt
tibble data frame