CapSeq and CIP-TAP identify Pol II start sites and reveal capped small RNAs as C. elegans piRNA precursors.
Gu W, Lee HC, Chaves D, Youngman EM, Pazour GJ, Conte D, Mello CC. CapSeq and CIP-TAP identify Pol II start sites and reveal capped small RNAs as C. elegans piRNA precursors. Cell. 2012 Dec 21; 151(7):1488-500.