FIG 4.
CXMS analysis of NuA4. Purified NuA4 was subjected to limited chemical cross-linking with DSS, which targets primary amines, and trypsinized. Peptides connected by DSS were identified by mass spectrometry. The locations of cross-linked intersubunit lysines are shown by two white circles connected by a black line. Subunit representations are marked in 100-residue intervals.