Sequencing stops at unexpected point!

[Rafael Maldonado]

Hello all,

Maybe is a FAQ, but there it goes: We have got a point were sequencing 
stops at an unexpected point. We are using ABI PRISM 310 and the ABI kit 
to sequence regular plasmids isolated from coli. First time the 
technician thought we had sent a PCR product! There is a region where 
are some His codon repeats, but nothing really evident to stop the 
polymerase. Have any of you experienced similar results? Is there a way 
to go thru that unsequencable region? Thanks

-- 
Rafael Maldonado, Ph. D.
Division of Genetics
University of Alicante
Spain