sullivan at gwis2.circ.gwu.edu
Sun Jun 1 04:00:24 EST 1997
While AAUAAA appears to be the most efficient signal in HeLa cell extract
assays, variations are tolerated (Sheets MD et al.,  Nucleic Acids
Res 18:5799-5805). AUUAAA is the most common one; I have also seen AAUAUA
in some Xenopus sequences. See also this review:
Baker, EJ 1993 "Control of poly(A) length" in Control of Messenger RNA
Stability. J.G. Belasco and G. Brawerman, eds. San Diego:Academic PRess,
Miss. V.M. Hodges (vhodges at hgmp.mrc.ac.uk)
: I have isolated a number of murine cDNAs by differential display, but some
: of them appear not to have a polyadenylation signal (AATAAA) even though
: they have what appears to be a poly A tail.
: Is there an alternative signal to AATAAA?
: Should I worry?
: Any advice would be appreciated.
: My E-mail address is v.hodges at qub.ac.uk if you want to contact me
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