Comment on

• An E. coli ribonucleoprotein containing 4.5S RNA resembles mammalian signal recognition particle.

  Poritz MA, Bernstein HD, Strub K, Zopf D, Wilhelm H, Walter P. Poritz MA, et al. Science. 1990 Nov 23;250(4984):1111-7. doi: 10.1126/science.1701272. Science. 1990. PMID: 1701272