Q: In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.
Although DRA1 * 0101 / DRB1 * 0401 and DRA1 * 0101 / DRB1 * 0404 are structurally very similar , nonoverlapping VP16 epitopes were identified , illustrating high selectivity of individual allele polymorphisms within common MHC variants .
A:
VP16 epitopes