Get the altered codon sequence for transcripts in transcriptIdColumn.
getCodonInAlt(
variantsTable,
transcriptsTable,
transcriptIdColumn,
codonPositionsColumn,
codonSeqColumn
)variants table
the name of the transcript id column for the codon region
the codon sequence column output from getCodon
transcripts structure table from ensembl with start and end columns for start and end coordinates of the target regions
the codon coordinates column output from getTranscriptIdsForCodonVariants
A list containing codon sequences after alt (NA if the transcript id in that row is NA). If transcriptIdColumn, codonPositionsColumn or codonSeqColumn does not exist in the variantsTable, return NA