The Scientist has asked a group of experts to periodically comment upon recent articles that they have found noteworthy. Their selections, presented here in every Issue, are neither endorsements of content nor the result of systematic searching. Rather, they are personal choices of articles they believe the scientific community as a whole may also find interesting. Reprints of any article. cited here may be ordered through The Genuine Article, 3501 Market Street, Philadelphia, Pa. 19104, or by telephoning (215)386-4899.
BY WILLIAM F. LOOMIS
Department of Biology
University of California, San Diego
La Jolla, Calif.
"U2 is a small nuclear RNA less than 200 bases long in metazoans but is a long molecule of 1,175 bases in yeast. Only 100 bases at each end of the yeast molecule are homologous to metazoan U2. These 200 bases are sufficient for all of the functions of U2 in yeast.
A.H. Igels, M. Ares, ...
