# SnpEff gene annotation with @ such as PCDHB@

I'm using snpEff to annotate some VCFs and getting some spurious annotations that don't have transcript ids. Some of these annotations have a gene name followed by ampersand such as PCDHB@ and I'm not finding any explanation in the docs.

Any idea what this refers to? Entire gene family?

Thanks.

The @ at the end of a name denotes a "gene cluster in chromosome region". This is mentioned in the official HUGO nomenclature guidelines in the "Characters reserved for specific usage" section: