Histones are a family of basic proteins that associate with DNA in the nucleus and help condense it into chromatin. Nuclear DNA does not appear in free linear strands; it is highly condensed and wrapped around histones in order to fit inside of the nucleus and take part in the formation of chromosomes.he beads are called nucleosomes. Each nucleosome is made of DNA wrapped around eight histone proteins that function like a spool and are called a histone octamer.
The preparation of a ... The purpose of making a smear is to fix the bacteria onto the slide and to prevent the sample from being lost ... ... fixation is a critical step in the preparation of ... Heat fixation: After a smear has dried at ... are rarely used alone for fixing blocks unless ...
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