Specialized proteins called cell cycle regulators, such as p53 and p21, regulate the progression of the cell cycle from one phase to the next. This progression through the checkpoints is strictly regulated and usually works without error. When errors do occur, they can have catastrophic consequences, including cancer. How did this study lend new evidence to our understanding of how genes regulate the cell cycle, giving us a better chance of developing successful cancer treatments

The change in the genes p53 and p21 results in deficits in checkpoints that result in cancer of various types. The G2-HM checkpoint deficits can be exploited in the development of targeted treatment.

A mutation in the above normal functioning of p53 can lead to the progression of damaged cells to mitosis which leads to cancer. So therapeutics which target any of these checkpoints can lead to developing a treatment for cancer.

satellites are frequently used to make observations of the orbit on earth

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation: