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Colony-forming unit-erythroid (CFU-E) cells are the most responsive to erythropoietin because they have the highest concentration of erythropoietin receptors (233, 238)

Arrest of cell cycle entry by FZR-1 and LIN-35 Rb To examine cooperation between fzr-1 and lin-35 in cell cycle arrest, we tested how inactivation of these genes affects expression of mcm-4 S phase reporter constructs

B12 is a required cofactor for DNA synthesis without enough of it, cells can't replicate efficiently

In some cases, vacuolar peptidases may cleave the glutamate and glycine of the original glutathione molecule, leaving the cysteinyl conjugate (cysteine-X) which may need further processing in Phase III reactions, such as incorporation into cell wall material

Peptides work as signaling molecules, helping the body re-engage pathways that may have gone quiet due to stress, aging, trauma, or hormonal shifts