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Statistical analysis of intramembranous particles using freeze fracture specimens
Author(s) -
Schladitz Katja,
Särkkä Aila,
Pavenstädt Iris,
Haferkamp Otto,
Mattfeldt Torsten
Publication year - 2003
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1046/j.1365-2818.2003.01210.x
Subject(s) - intramembranous ossification , function (biology) , fracture (geology) , planar , chemistry , physics , materials science , mathematics , biology , anatomy , computer science , microbiology and biotechnology , composite material , computer graphics (images)
Summary We studied the point processes of intramembranous particles of mitochondrial membranes from HeLa cells using the freeze fracture technique. Three groups – under normal conditions, after exposition with rotenone, and after exposition with sodium acid – were compared. First, we used several summary statistics in order to study the two‐dimensional point patterns of intramembranous particles within each group. Then, we compared the patterns in different groups by bootstrap tests using the K ‐function and the nearest neighbour distance function G ( r ). Estimation of the G ‐function provided significant results but no significant differences between groups were found using the classical K ‐function; estimation of G ( r ) should therefore not be omitted when studying observed planar point patterns.