About the Authors

Boris V Skryabin

Affiliation Institute of Experimental Pathology (ZMBE), University of Münster, Münster, Germany

Leonid V Gubar

Affiliation Institute of Experimental Pathology (ZMBE), University of Münster, Münster, Germany

Birte Seeger

Affiliation Institute of Experimental Pathology (ZMBE), University of Münster, Münster, Germany

Jana Pfeiffer

Affiliation Institute of Experimental Pathology (ZMBE), University of Münster, Münster, Germany

Sergej Handel

Affiliation Institute of Experimental Pathology (ZMBE), University of Münster, Münster, Germany

Thomas Robeck

Affiliation Institute of Experimental Pathology (ZMBE), University of Münster, Münster, Germany

Elena Karpova

Affiliation Institute of Experimental Pathology (ZMBE), University of Münster, Münster, Germany

Timofey S Rozhdestvensky

Affiliation Institute of Experimental Pathology (ZMBE), University of Münster, Münster, Germany

Jürgen Brosius

To whom correspondence should be addressed. E-mail: RNA.world@uni-muenster.de

Affiliation Institute of Experimental Pathology (ZMBE), University of Münster, Münster, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

BVS generated the PWScr-deleted mice and participated in manuscript preparation. LVG performed Southern blot analyses of mouse tail biopsies. BS performed Northern blot analyses. JP assisted with ES cell culture. SH assisted with blastocyst injection. EK isolated PAC clones. TR assisted with mouse weight analysis. TSR participated in result interpretation and manuscript writing. JB conceived and supervised the project and participated in manuscript preparation.