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Sometimes one just isn't enough: do vertebrates contain an H2A.Z hyper-variant?

Monika Mehta^†, Hyun-Soo Kim^† and Michael-Christopher Keogh^*

* Corresponding author: Michael-Christopher Keogh michael.keogh@einstein.yu.edu
† Equal contributors

Journal of Biology 2010, 9:3 doi:10.1186/jbiol214