Secondary structure of human leukocyte interferon from Raman spectroscopy.
作者： R W Williams
DOI: 10.1016/S0021-9258(18)89212-2
关键词:
摘要: Raman spectra were taken of human alpha (leukocyte) interferon subtype A (HuIFN-alpha A) purified from extracts transformed Escherichia coli. Quantitative analysis the conformationally sensitive amide I band indicates that IFN (interferon)-alpha is 75 +/- 5% helical and 7 4% beta-strand. An independent III spectrum 71 helix 10 6% These results differ with a recently proposed three-dimensional model based on secondary structure predictions derived sequence circular dichroism measurements. The IFN-alpha compared several other proteins: hemerythrin, intestinal calcium-binding protein, melittin, insulin.
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