Sorry I put the plots as attachments. Please click the link, <http: www.unc.edu="" ~jjin="" graph=""/>, and then click each of them for viewing. Thanks! JP- ################################## Jianping Jin Ph.D. Bioinformatics scientist Center for Bioinformatics Room 3133 Bioinformatics building CB# 7104 University of Chapel Hill Chapel Hill, NC 27599 Phone: (919)843-6105 FAX: (919)843-3103 E-Mail: jjin at email.unc.edu