In contrast to the synthesis, that occurs only intracellularly, the degradation or catabolic part of the GSH cycle, takes place partially extracellularly and partially inside cells
Trends Biomedical Eng
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Ex vivo studies using dissected hair follicle organ cultures allow researchers to observe the effects of GHK-Cu on the hair cycle itself, particularly its potential to prolong the anagen (growth) phase
Both -TrCP1 and -TrCP2 bind PER1/2, and expression of a mutant -TrCP lacking the F-box domain prevents PER2 degradation (Eide et al., 2005