Interphase(Long) >Gl: Cell growth >S: DNA replication 1.G1期(gap1 phase) >G2: Cell growth G2-M Boundary 2. S#(synthesis phase) M Phase G2 Phese 3.G2期(gap2 phase) -4-6 hr Cap G1 Phese Gap 1-810 hr Checkpoint c4.M期( mitosis phase) Indefinite durat on S Phase DNA synth G1-S Boundary 5.G0期 Decis on Point M-phase= mitosis(Short) > Chromosome segregation >Cytokinesis 刘新文,细胞增值调控刘新文，细胞增值调控 1. G1期（gap 1 phase） 2. S期（synthesis phase） 3. G2期（gap 2 phase） 4. M期（mitosis phase） 5. G0期 Checkpoint Checkpoint Checkpoint Checkpoint Checkpoint Checkpoint Interphase (Long) ØG1: Cell growth ØS: DNA replication ØG2: Cell growth M-phase= mitosis (Short) ØChromosome segregation ØCytokinesis