Volume 49, number 2 (1998), in article no. GE985209 "Characterization of gene expression in mouse blastocyst using single-pass sequencing of 3995 Clones," by nobuya sasaki, sumiharu nagaoka, masayoshi itoh, masaki izawa, hideaki konno, piero carninci, atsushi yoshiki, moriaki kusakabe, tetsuya moriuchi, masami muramatsu, yasushi okazaki, and yoshihide hayashizaki, pages 167-179