Surface-enhanced Raman spectra of natural tissue and cancerous tissue of lung from 300 to 1700 cm(-1) were measured. In the cancerous tissue of lung, the orderly conformations of amides III and amides I of the main chains in protein such as alpha-helix, beta-corner and no rules curly were damaged seriously; conversely, the extendable vibration of skeleton C-N and skeleton C-C increased. Side chains change became complicated. In general, the content of nucleic acids increases in the cancer tissue of lung. The lengthways conformations of lecithoid chains is out-of-order in the cancerous tissue of lung compared with the natural ones.
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