Re: [ccp4bb] query on DNA-protein complex preparation for crystallization

2008-06-23 Thread Phoebe Rice
You should add some salt when you anneal!!! The duplex is highly negatively charged, so adding even a small amount (like 10mM NaCl) will help with charge screening, thus making the two strands less repellant to each other. Buffer is also always a good idea. At low pH and high temp you'll

Re: [ccp4bb] query on DNA-protein complex preparation for crystallization

2008-06-22 Thread E rajakumar
To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] query on DNA-protein complex preparation for crystallization Dear All Sorry for non-crystallography question. I have synthesized two complementary strands of 16 bases in length for making duplex DNA and co-crystallization with DNA binding protein. I

Re: [ccp4bb] query on DNA-protein complex preparation for crystallization

2008-06-22 Thread William Scott
21, 2008 5:48 PM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] query on DNA-protein complex preparation for crystallization Dear All Sorry for non-crystallography question. I have synthesized two complementary strands of 16 bases in length for making duplex DNA and co-crystallization with DNA

Re: [ccp4bb] query on DNA-protein complex preparation for crystallization

2008-06-22 Thread E rajakumar
- From: CCP4 bulletin board [mailto:[EMAIL PROTECTED] On Behalf Of E rajakumar Sent: Saturday, June 21, 2008 5:48 PM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] query on DNA-protein complex preparation for crystallization Dear All Sorry for non-crystallography question. I have

Re: [ccp4bb] query on DNA-protein complex preparation for crystallization

2008-06-22 Thread Artem Evdokimov
, 2008 1:01 PM To: CCP4BB@JISCMAIL.AC.UK Subject: Re: [ccp4bb] query on DNA-protein complex preparation for crystallization Hi Thank you for the mail. It seems your correct. A(260 nm)/A(280) of one oligo is around 1.0 and peak is around 272. Other oligo's(260 nm)/A(280) is around 1.5. Can I know what

[ccp4bb] query on DNA-protein complex preparation for crystallization

2008-06-21 Thread E rajakumar
Dear All Sorry for non-crystallography question. I have synthesized two complementary strands of 16 bases in length for making duplex DNA and co-crystallization with DNA binding protein. I have mixed two complementary strands of 1:1 molar ratio (0.5 mM) in water and concentrated to 1.5 mM

Re: [ccp4bb] query on DNA-protein complex preparation for crystallization

2008-06-21 Thread Artem Evdokimov
:[EMAIL PROTECTED] On Behalf Of E rajakumar Sent: Saturday, June 21, 2008 5:48 PM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] query on DNA-protein complex preparation for crystallization Dear All Sorry for non-crystallography question. I have synthesized two complementary strands of 16 bases in length