HDAC9 and metastatic malignant neoplasm: In search of a molecular mechanism underlying the induction of antigen processing and presentation of metastatic tumour cells, we conducted H3K27ac ChIPseq analysis on curcuphenol-treated A9 metastatic tumour cells in order to understand if curcuphenol acts as an HDAC activator of genes associated with antigen processing and recognition of metastatic cancers.