CRISPR Interference Directs Strand Specific Spacer Acquisition Swarts, Daan C. ; Mosterd, Cas ; van Passel, Mark W. J. ; Brouns, Stan J. J. Abstract Publication: PLoS ONE Pub Date: April 2012 DOI: 10.1371/journal.pone.0035888 Bibcode: 2012PLoSO...735888S