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Conditional gene knockout is a technique used to eliminate a specific gene in a certain tissue, such as the liver. [ 1 ] [ 2 ] This technique is useful to study the role of individual genes in living organisms.
A conditional gene knockout allows gene deletion in a tissue in a tissue specific manner. This is required in place of a gene knockout if the null mutation would lead to embryonic death, [13] or a specific tissue or cell type is of specific interest. This is done by introducing short sequences called loxP sites around the gene.
This figure depicts how Floxing is used in scientific research for spatial and temporal control of gene expression. In genetic engineering, floxing refers to the insertion of a DNA sequence (which is then said to be floxed) between two LoxP sequences, creating an artificial gene cassette which can then be conditionally deleted (knocked out), translocated, or inverted in a process called Cre ...
The ITF specifies that a tennis ball must have a diameter of 6.54–6.86 cm (2.57–2.70 in) and a weight of 56.0–59.4g. Yellow and white are the only approved colors at tournament level. [3] [141] Tennis bubble: Indoor tennis facility consisting of a domed structure which is supported by air pressure generated by blowers inside the structure.
Under the Rules and Regulations of Tennis, [1] when a player violates a rule or does not follow the tennis code of conduct, the umpire or tournament official can issue one of the following (Section IV, Article C, Item 18 – "Unsportsmanlike Conduct"): "Point Penalty" "Suspension Point" Generally, this results in the following escalation:
Tennis is a racket sport that is played either individually against a single opponent or between two teams of two players each . Each player uses a tennis racket strung with a cord to strike a hollow rubber ball covered with felt over or around a net and into the opponent's court. The object is to manoeuvre the ball in such a way that the ...
Disqualifications in tennis can occur for unsporting conduct. ATP rules state that: Players shall not at any time physically abuse any official, opponent, spectator or other person within the precincts of the tournament site. For purposes of this rule, physical abuse is the unauthorized touching of an official, opponent, and spectator or other ...
Pages in category "Tennis terminology" The following 28 pages are in this category, out of 28 total. This list may not reflect recent changes. ...