get_mut_seq_exjun: Get mutated coding sequence and junctions
In ZYBunnyHu/masonmd: Make Sense of Nonsense-Mediated Decay

Get mutated coding sequence and junctions

1 2	get_mut_seq_exjun(wt_exjun, wt_seq, mut_start, mut_end, mut_nt, ref_nt, note, txid)

`wt_exjun`	a string that consists of 0 or 1 to indicates the positions of exon-exon junctions in the coding sequence;
`wt_seq`	wildtype coding sequence
`mut_start`	position of mutation start in chromosome
`mut_end`	position of mutation end in chromosome
`mut_nt`	nucleotides after alteration
`ref_nt`	the nucleotides on the reference genome at the mutated position; the nucleotides before mutation
`note`	extra notes
`txid`	transcript ID