THE CHLAMYDOMONAS SOURCEBOOK on p. 525 says that pf-21 "may no longer be extant." Does anyone out there in Chlamyland by any chance still have pf-21? (If it's still available, I'd like to use it for mapping experiments at that end of linkage group II.) Many thanks. Peter Luykx Dept. of Biology Univ. of Miami pluykx at umiami.ir.miami.edu