G2 phase
G2 phase
G2 phase (pronounced "G-two phase") is a period in the cell cycle from the completion of DNA synthesis (S phase) until the beginning of mitosis (M phase). The G2 phase is the third subphase of the interphase, where the cell prepares for the mitosis phase.
Etymology
The term "G2 phase" is derived from the word "gap", referring to the period between the completion of DNA synthesis and the start of mitosis. The number "2" signifies that it is the second gap phase, following the G1 phase and the S phase.
Function
During the G2 phase, the cell continues to grow and produce new proteins. At the end of this phase, the cell checks the DNA for any damage that might have occurred during the S phase. If any damage is detected, the cell cycle is halted, and the damage is repaired before the cell can proceed to the M phase.
Related Terms
- Cell cycle: The series of events that take place in a cell leading to its division and duplication.
- Interphase: The phase of the cell cycle in which a typical cell spends most of its life. During this phase, the cell copies its DNA in preparation for mitosis.
- S phase: The part of the cell cycle in which DNA is replicated, occurring between G1 phase and G2 phase.
- M phase: The phase of the cell cycle that includes mitosis and cytokinesis.
External links
- Medical encyclopedia article on G2 phase
- Wikipedia's article - G2 phase
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