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Re: [ccp4bb] About deblock N-terminus |
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- Protein crystallographyMain steps:- Protein purification- Crystallisation Special:- Programs for crystallography- X-ray detectors Basic tutorials:- Chemistry- Protein - Peptide - Amino Acids Xtal community:- CCP4BB |
CCP4bb navigationCCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999Subject: Re: About deblock N-terminus From: verdino {- at -} SCRIPPS {- dot -} EDU verdino {- at -} SCRIPPS {- dot -} EDU Date: 2007-11-16 A<47390.66.167.207.229.1194561962.squirrel@mail.acg.ucsc.edu> <23641A426585724B8D08AFABDD7C52D8F66141@newton.cbse.uab.edu> <22BC8E7C89E0D14ABA4C08C7FB5B509E092B4D1D@MCWPOST.mcwcorp.net> <2501.10.1.50.11.1195242023.squirrel@secure.hwi.buffalo.edu> In-Reply-To: <2501.10.1.50.11.1195242023.squirrel@secure.hwi.buffalo.edu> X-Virus-Scanned: ClamAV version 0.90.3, clamav-milter version 0.90.3 on relay1b X-Virus-Status: Clean X-Spam-Score: undef - spam scanning disabled X-CanItPRO-Stream: 10_OptOut (inherits from default) X-Scanned-By: MIMEDefang 2.61 on 130.246.193.105 X-Scanned-By: CanIt (www . roaringpenguin . com) on 137.131.200.30 X-CCLRC-SPAM-report: 0.548 : NO_REAL_NAME,SPF_HELO_PASS,SPF_PASS Hi, could as well be that your first residue is Gln which frequently cylizes to pyroglutamate which resists Edman chemistry. In that case you can deblock your N-terminus with pyroglutamate aminopeptidase (you can get it from Takara, Sigma, Boehringer, Pierce - whicheverone you like ;-)). THere are well working standard protocols. Cheers, Petra -- PLEASE NOTE THE NEW PHONE NUMBER!!! Petra Verdino, PhD Research Associate The Scripps Research Institute, BCC206 10550 North Torrey Pines Road CA 92037 La Jolla, USA tel:1-858-784-2945 fax:1-858-784-2980 CCP4bb navigationCCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999 |
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