The result of a calibration may be recorded in a document, sometimes called a calibration certificate or a calibration report. See CLAS Requirements Document 6 Requirements for Calibration Certificates issued by CLAS Laboratories.
DNA and histone proteins are packaged into structures called chromosomes. In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes.Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.Chromosomes are not visible in the cellâs nucleusânot even under a microscopeâwhen the cell is not dividing.However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope.n the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
First, the DNA in the gel need to be stained using DNA staining solution. The stain is a chemical called ethidium bromide, which binds to DNA and shows up under fluorescent light. Although, we cannot see single DNA strands, we can see large groups of stained DNA strands. These groups will show up as bands in the gel. Drag the gel out of the mold and put it into the DNA staining solution. It takes about half an hour to stain the DNA in the gel.