Dear All,

I am refining a structure and have come across strong electron density for an unknown ligand (see below). Would someone be able to identify this unknown ligand that somehow was co-purified with the protein.

The electron density shape does not match anything included in the crystallization conditions.

Thanks for your help in advance,

Gordon

M. Gordon Joyce, Ph.D.

Virology Lab,

Vaccine Research Center,

NIAID/NIH

40 Convent Dr., Room 4613B

Bethesda, MD  20892

Phone: 301-594-8717

Fax: 301-480-2658

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