Plunge pool softer or fractured rock has been eroded back to a knickpoint, water continues to bombard its base. Because this rock is often less resistant than overlying strata, the water from the higher elevation continues eroding downward until an equilibrium is achieved. A somewhat similar bowl-shaped feature developed by flowing water, as opposed to falling water, is known as a scour hole. These occur both naturally and as a result of bridge building. Plunge pool A plunge pool (or plunge basin or waterfall lake) is a deep depression in a stream bed at the base of a waterfall or shut-in. It
Sequence feature variant type a feature, the larger its number of variant types. For a given protein, once its amino acid sequence is determined, its sequence feature variant type is determined. SFVTs can be used to study the protein functions across many related species. Such studies have been carried out on several human pathogens. SFVTs are also available on Influenza Research Database for flu proteins and on Virus Pathogen Database and Analysis Resource for Dengue virus. Sequence feature variant type The Sequence Feature Variant Type (SFVT) refers to the defined sequence variation (mutation) of a given sequence feature in a protein. Consider a protein,