RE:OLIGO program (Nuc Acids Res (1989) 17,8543-8551.) The algorithm discussed in that NAR paper is also the one used in PRIMER, avilable by FTP from genome.wi.mit.edu. - Steve Lincoln Cold Spring Harbor Labs Hershey Bldg., 1 Bungtown Rd, Cold Spring Harbor, NY, 11724 Phone: 516-367-8395 Fax: 516-367-8461 Email: lincoln at cshl.org