Alternative methods for viewing sequence chromatograms:
The UTHSCSA
Nucleic Acids Core Facility (http://www.uthscsa.edu/core/nucleicacids/index.html)
uses ABI capillary sequencers are will return (usually by e-mail) an .ab1
chromatogram file along with their base calls. The following are options
for viewing the chromatograms:
-
Through LaserGene. LaserGene can be run from your PC on the
Bioinformatics
core site license. The general procedure is:
-
Save your .ab1 files to your computer. Avoid saving from webmail;
use Eudora or other mail program.
-
You must get a username and password for accessing LaserGene through the
site license. Contact Dr.
Demeler or Jeremy Mann.
-
Your PC must be set up to access the University Microsoft NT domain.
From outside the UTHSCSA domain you must have installed a vpn connection,
and activate that first.
-
In the <Start><run> box type //129.111.69.180, and enter your username
and password for LaserGene when prompted. (For some of the older windows
systems, it will use your desktop username and password automatically,
so you may have to create a user by that description and login to the PC
as such).
-
Click the DNAStar folder in the window that opens.
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Click the SeqMan folder.
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Click the SeqMan.exe file.
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Click on <file><new>
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Click <skip> on the window asking about vector data.
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Click <add sequences> on the "unassembled sequences window"
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Navigate to folder with ab1 files, select one or more, click <add>,
and <done>.
-
Select a sequence to view from menu and click <sequence><show trace
data>
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Through Vector NTI.
-
Vector NTI is available through the Bioinformatics
Core on a site licesnse for both PC and Mac OsX..
-
The first time you use Vector NTI on a particular computer on the University
site license, there is is a lengthy download process. Get authorization
from Dr. Demeler or Jeremy
Mann, and see the installation notes on the bioinformatics
web site.
-
When you use Vector NTI, you must request one of the slots available under
the site license for the particular program you want to use. In this
case, run the License Manager (<Start><Programs><Informax><License
Manager>), and set the Contig Express Box to <Dynamic License>.
The first time you request a license slot there are extra steps to fill
out some forms. These steps are also described at the bioinformatics
web site.
-
Now Run the Vector NTI contig express program (<start><programs><Informax><Vector
NTI suite 8><Contig Express>).
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Under the <project> menu click on <Add fragments> and <from ABI
files>
-
Navigate to your directory with the ab1 sequence(s) and load one or more
sequences.
-
Double click on the .ab1 file you wish to view in the resulting menu.
-
Your slot to use this program will expire in a week, at which time you
will have to renew it. If you will not use it again soon, please
use the License Manager and set Contig Express back to "Demo" so that you
will not tie the slot up for someone else who wishes to use the program.
-
The Core facility uses Sequencher. There is a copy installed
for users in the facility that works in demo mode. You could view
your data there, but not save or print it.
-
The Core facility recommends installing the following software to view
chromatograms:
-
For Macs: EditView from Applied Biosystems.
-
For PC's: Chromas from www.technelysium.com/au/chromas.html.
-
EMBOSS
abiview accessed at the bioinformatics core. This program could
not scroll through the chromatogram, so it was not particularly helpful
for normal use. However, for the purpose of printing color chromatograms,
its cps option was excellent.
-
The chromatograms can be viewed on software native to the sequencers
themselves prior to being exported for analysis. This means of viewing
the sequence is generally only open to the facility operators.
-
The
Phred/Phrap/Consed system available through the bioinformatics
core facility is generally only used for large shotgun assembly projects.
We currently don't have a help file describing all the steps necessary
to set up a new user. You would have to consult the Bioinformatics
core or Dr. Hardies if you wish
to use this system. Chromatograms are viewed in context with assembled
sequence through Consed. This system makes it generally difficult to view
the chromatogram of a sequence prior to assembly. Basically one has
to create a dummy database and force the sequence reads into it.
Last update 3/22/2003- Steve Hardies