Electron Microscopy of Human Erythrocyte Catalase: New Two-Dimensional Crystal 
Forms

Harris, J. R.; Engelhardt, H.; Volker, S.; Holzenburg, A.

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Electron Microscopy of Human Erythrocyte Catalase: New Two-Dimensional Crystal Forms

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Harris, J. R., Engelhardt, H., Volker, S., & Holzenburg, A. (1993). Electron Microscopy of Human Erythrocyte Catalase: New Two-Dimensional Crystal Forms. J. Struct. Biol., 111(1), 22-33.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0010-73BD-C

Abstract

Using the mica-spreading "negative staining-carbon film" procedure, human erythrocyte catalase has been shown to create a number of different periodic or crystalline two-dimensional (2-D) arrays which differ in the arrangement of molecules in the repeating units and the lattice type. Digital image processing has been performed with a 2-D array which contains regularly arranged "undulating" rows of molecules and also with a 2-D crystal form, exhibiting pgg (p22121) symmetry and lattice parameters of a = 12.7 nm, b = 44 nm, and small gamma, Greek= 92°. The data are compared with our previous analysis of a different human erythrocyte catalase 2-D crystal, and the effect of partial-depth negative staining occurring in all the various 2-D forms is discussed.