I am using homo.sapiens package (1.3.1, hg19 annotation) for my annotation, I have noted that when using
genes(Homo.sapiens, columns = "SYMBOL")
there is no HLA class genes included in mcol(HLA-A, HLA-B, HLA-C ...etc), but when I changed code to
transcripts(Homo.sapiens, columns = "SYMBOL")
I can find HLA class genes included in mcol(with several different transcripts).
I am wondering about what caused this issue because in other situations, "genes" command works fairly fine to extract information. Thanks for answering my question.