In article <28MAY199418143078 at violet.ccit.arizona.edu>, krukonis at violet.ccit.arizona.edu (KRUKONIS, GREG) writes: > Proteinaceous infectious agent. > Anyone know why it's not Proin? Probably so that it ends in -on; as in codon, operon, muon, transposon, etc. Besides, would proin really have caught on? Jon Clewley