The period of the CELL CYCLE preceding DNA REPLICATION in S PHASE. Subphases of G1 include "competence" (to respond to growth factors), G1a (entry into G1), G1b (progression), and G1c (assembly). Progression through the G1 subphases is effected by limiting growth factors, nutrients, or inhibitors.

Descriptor ID	D016193
MeSH Number(s)	G04.299.134.500.320
Concept/Terms	G1 Phase G1 Phase G1 Phases Phase, G1 Phases, G1 First Gap Phase First Gap Phases Gap Phase, First Gap Phases, First Phase, First Gap Phases, First Gap Gap Phase 1 1, Gap Phase Phase 1, Gap G1b Phase G1b Phase G1b Phases Phase, G1b Phases, G1b G1a Phase G1a Phase G1a Phases Phase, G1a Phases, G1a

Below are MeSH descriptors whose meaning is more general than "G1 Phase".

Below are MeSH descriptors whose meaning is related to "G1 Phase".

Below are MeSH descriptors whose meaning is more specific than "G1 Phase".