PDF) Mitochondrial Glutathione Import Enables Breast Cancer Metastasis via Integrated Stress Response Signaling SLC25A48 controls mitochondrial choline import and metabolism Choline metabolism depends on its mitochondrial import, but the mechanism remains unknown. SLC25A48 is a previously uncharacterized mitochondrial inner membrane carrier protein. The Mitochondria at the crossroads of health and disease: Cell Scientists discover how mitochondria import antioxidants