+**Cb5** (Cytochrome b5) is a small, vital [Heme](/wiki/Heme) protein. It participates in electron transfer, primarily within the [Endoplasmic Reticulum](/wiki/Endoplasmic_Reticulum), facilitating various metabolic pathways.
+## See also
+- [Cytochrome](/wiki/Cytochrome)
+- [Electron Transfer](/wiki/Electron_Transfer)
+- [Protein](/wiki/Protein)
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