Bibliographic Details
| Title: |
Fragmentation of tryptophan by low-energy electrons |
| Authors: |
Abdoul-Carime, H. hcarime@chemie.fu-berlin.de, Gohlke, S.1, Illenberger, E.1 |
| Source: |
Chemical Physics Letters. Feb2005, Vol. 402 Issue 4-6, p497-502. 6p. |
| Subjects: |
Particles (Nuclear physics), Amino acids, Scission (Chemistry), Molecular dynamics |
| Abstract: |
Abstract: Decomposition of gas phase tryptophan (trp) following low energy (<10 eV) electron attachment is investigated by means of a crossed electron/molecular beam experiment. Various negatively charged species are observed, attributed to (trp−H)− (203 amu), (gly-yl)− (74 amu), (45 amu), CN− (26 amu), OH− (17 amu), and (16 amu). These fragments arise from either simple bond cleavages (e.g., (trp−H)−) or more complex reaction involving molecular rearrangements within the transitory negative ion (e.g., (HCO2)−). Surprisingly, by far the most predominant dissociation processes occur at sub-excitation energies (below the threshold of the electronic excitation). The present Letter may contribute to a better understanding of the initial molecular processes taking place during the interaction of radiation with living systems. [Copyright &y& Elsevier] |
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| Database: |
Engineering Source |
