The apoptosis-generated N-terminal fragment of HDAC7 is unstable.
HEK293 cells transfected with FLAG-HDAC7, HDAC7-FLAG, or FLAG-HDAC7-FLAG were
treated with 200 ng/ml TRAIL for the indicated times. Cell lysates were
normalized for protein concentration, resolved by SDS-PAGE, and immunoblotted
(IB) with the indicated antibody. Asterisks represent
nonspecific bands and serve as loading controls. Although the polyclonal HDAC7
antibody is specific and recognizes the N terminus (Santa Cruz Biotechnology,
N-18) the position of the epitope(s) is unknown.