Eustachian Tube Growth and Development: Anatomy/Function. Protocol Description. This study measures Eustachian tube function and facial growth over time in three groups of children: one with recurrent ear infections, one with chronic middle ear fluid, and one with little past history of otitis media.
Causes of Kartagener syndrome. Kartagener syndrome is caused by a mutation in the DNAI1 gene, which makes a cellular protein required for normal functioning cilia (cilia line the respiratory tract) and sperm motility.
There are a number of causes of frameshift mutations. A common one happens when cells are exposed to UV rays from the sun. When a cell is hit with UV rays any sections of DNA that have a pair of Tâs side by side will cause these nucleotides to bond to each other rather than to the pair of Aâs on the opposite strand.