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C 1s NEXAFS spectra of protein (albumin), polysaccharides (sodium alginate), lipid (1-palmitoyl-2-hydroxy-sn-glycero-3-phosphocholine), and nucleic acid (calf thymus DNA). All spectra were recorded with the ALS 7.0.1 STXM, with the exception of that of DNA, which was recorded with the ALS 5.3.2 STXM.
