The Half Windsor Knot Tying Instructions. 1  1. Start with the wide end of the tie on the right and the small end on the left. 2  The tip of the small end should rest slightly above your belly-button (this will vary depending on your height and the length & thickness of your tie).
Ethidium bromide is an intercalating agent commonly used as a fluorescent tag (nucleic acid stain) in molecular biology laboratories for techniques such as agarose gel electrophoresis. It is commonly abbreviated as EtBr , which is also an abbreviation for bromoethane.
Ethidium bromide intercalated between two adenine-thymine base pairs. The intercalation may cause mutation of DNA. Ethidium bromide is thought to act as a mutagen because it intercalates double stranded DNA (i.e., inserts itself between the strands), deforming the DNA.This could affect DNA biological processes, like DNA replication and transcription.thidium bromide is thought to act as a mutagen because it intercalates double stranded DNA (i.e., inserts itself between the strands), deforming the DNA. This could affect DNA biological processes, like DNA replication and transcription.