The programs in lintre-sunos.tar.Z are for (1) testing the molecular clock on a given topology of a phylogenetic tree and (2) making linearized trees (reestimating branch lengths under the assumption of constant rate of evolutions. The data that can be used are nucleotide or amino acid sequences. Note that the programs run on Sun workstations at least for now. For details of the methods, please look at "Phylogenetic tests of the molecular clock and linearized trees" (Molecular Biology and Evolution 12: 823-833, 1995). (1) Ftp lintre-sunos.tar.Z and lintre-sunos.readme onto your system in the binary mode. (2) Type "uncompress lintre-sunos.tar.Z". (3) Type "tar xvf lintre-sunos.tar". (4) Read the read.me file first. If you have problems or comments, please send email to: takezaki@imeg.bio.psu.edu March 16, 1996 Naoko Takezaki 322 Mueller Penn State University University Park, PA 16802 USA TEL 814(865)7030 FAX 814(863)7336