Mechanisms of protein and virus crystal growth: An atomic force microscopy study of canavalin and STMV crystallization
- Lawrence Livermore National Lab., CA (United States). Dept. of Chemistry and Materials Science
- Univ. of California, Riverside, CA (United States). Dept. of Biochemistry
The evolution of surface morphology and step dynamics during growth of rhombohedral crystals of the protein canavalin and crystals of the cubic satellite tobacco mosaic virus (STMV) have been investigated for the first time by in situ atomic force microscopy. These two crystals were observed to grow by very different mechanisms. Growth of canavalin occurs on complex vicinal hillocks formed by multiple, independently acting screw dislocations. Small clusters were observed on the terraces. STMV on the other hand, was observed to grow by 2D nucleation of islands. No dislocations were found on the crystal. The results are used to determine the growth mechanisms and estimate the fundamental materials parameters. The images also illustrate the important mechanism of defect incorporation and provide insight to the processes that limit the growth rate and uniformity of these crystals.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Aeronautics and Space Administration, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 244580
- Report Number(s):
- UCRL-JC-124110; CONF-9506352-1; ON: DE96011136; TRN: AHC29613%%55
- Resource Relation:
- Conference: 11. international conference on crystal growth, Hague (Netherlands), Jun 1995; Other Information: PBD: May 1996
- Country of Publication:
- United States
- Language:
- English
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