passages.id: split_5_test_555_passage
passages.type: progene_text
passages.text: On infection , the herpes simplex virus ( HSV ) virion protein VP16 ( Vmw65 ; alphaTIF ) forms a transcriptional regulatory complex - the VP16 - induced complex - with two cellular proteins , HCF and Oct-1 , on VP16 - responsive cis - regulatory elements in HSV immediate - early promoters called TAATGARAT .