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[Rajan Sankaranarayanan <sankar@ccmb.res.in>]

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hi,
	We are planning to prepare heavy atom derivatives of a crystal form grown
at acidic pH (4 to 5) with PEG 4000 or 6000 and with 10mM to 100mM Amm.
Sulphate as additive. Any special care that has to be taken or any useful
suggestion for successful derivatization at this pH are most welcome.

	Thanks in advance,
Sankar 

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	Dr. R. Sankaranarayanan
	Room No: E006
	Centre for Cellular and Molecular Biology (CCMB)
	Uppal Road
	Hyderabad - 500 007
	India.

        Ph:  +91-(0)40 27192832 to 2835 (Lab)
             +91-(0)40 2717 2241      (CCMB Reception)
             +91-(0)40 2717 1504      (Residence)
        Fax: +91-(0)40 2716 0591, 2716 0252
        e-mail: sankar@ccmb.res.in
                sankarfr@yahoo.com

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