Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 112, Issue 15, Pages 4478-4480Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp801248n
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We report, compare, and analyze near-edge X-ray absorption fine structure (NEXAFS) spectra of powder samples of four different functional proteins, namely, lysozyme, ovalbumin, bovine serum albumin, and type-I collagen, at all relevant absorption edges. The spectra of all of the above proteins were found to be quite similar and to exhibit minor differences only. Nevertheless, despite the general similarity, the spectra of the individual proteins are distinguishable, and some of the respective differences clearly correlate with their amino acid compositions. Further factors affecting the NEXAFS spectra of proteins beyond the building block approach are discussed.
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