validateTranscripts checks 1) whether a transcript has a peptide sequence, 2) whether the peptide sequence ends with "*", 3) whether the peptide starts with "M"
validateTranscripts(transcriptIds, species, ensemblVersion, dataDir = "data")a list of Ensembl transcript ids
human or mouse
Ensembl database version
transcript_regions with additional flags: protein_coding, valid_startcodon, valid_stopcodon