JCS -- Rath et al. 119 (11): 2332 Figure IG5

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Fig. 5. Ultrastructure of Chro⁷¹/Chro⁶¹² mutant polytene chromosomes. (A) TEM micrograph of a wild-type polytene chromosome. Note the clear segregation into bands and interbands and the orderly alignment of euchromatic chromatid fibrils. (B,C) Chromosomes from Chro⁷¹/Chro⁶¹² polytene salivary gland nuclei. The micrograph in B shows the disorganization and misalignment of band/interband polytene chromosome regions (arrows). The micrograph in C shows the folding and coiling of the chromosomes with numerous ectopic contacts connecting non-homologous regions (arrows).