<cri_photo_page pcr2 | stock_photo:labs:chem_car:activities:pcr:pcr2_s.jpg | stock_photo:labs:chem_car:activities:pcr:pcr2_l.jpg | stock_photo:labs:chem_car:activities:pcr:pcr2_o.jpg | 27 January 2009 | Polymerase chain reaction >