Electronic image filtering to enhance the chromatin differences in texture observed between regular and irregular alkaline comets original images are top right comet of C and D. May 31, Close View raw image Chromatin swelling in tench sperm after being in contact with fresh water. Fish that employ external fertilization tend to produce comparatively large numbers of relatively very small spermatozoa, and may therefore be under strong selection to condense haplotypic DNA into a very small package Stockley et al. These could be apurinic or apirimidinic sites Liu et al.
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