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UCP2 is 309 amino acids long with domains located in the mitochondrial matrix, in the inner mitochondrial membrane and in the intermembrane mitochondrial space.  
UCP2 is 309 amino acids long with domains located in the mitochondrial matrix, in the inner mitochondrial membrane and in the intermembrane mitochondrial space.  
More precisely it can be described as a chain of six transmembrane helices and three amphipathic helices. The structure consists of three pseudo-repeats in which a transmembrane helix is linked by a loop to an amphipathic helix, followed by another transmembrane alpha helix. <ref>Kream, E., Mitochondrial uncoupling protein 2 [https://collab.its.virginia.edu/access/content/group/f85bed6c-45d2-4b18-b868-6a2353586804/2/Ch20_Kream_E_Uncoupling_Protein_2_(Mitochondrial)-_-/Ch20_Kream_E_Uncoupling_Protein_2_(Mitochondrial)_MitochondrialUncouplingProtein2.html]<ref/>
More precisely it can be described as a chain of six transmembrane helices and three amphipathic helices. The structure consists of three pseudo-repeats in which a transmembrane helix is linked by a loop to an amphipathic helix, followed by another transmembrane alpha helix. <ref> Kream, E., Mitochondrial uncoupling protein 2 [https://collab.its.virginia.edu/access/content/group/f85bed6c-45d2-4b18-b868-6a2353586804/2/Ch20_Kream_E_Uncoupling_Protein_2_(Mitochondrial)-_-/Ch20_Kream_E_Uncoupling_Protein_2_(Mitochondrial)_MitochondrialUncouplingProtein2.html] <ref/>


In addition, transmembrane helices are mainly composed of Hydrophobic amino acids with a lot of alanine, valine and leucine. <ref>[https://www.uniprot.org/uniprot/P70406] UniProtKB - P70406 UCP2_MOUSE <ref/>
In addition, transmembrane helices are mainly composed of Hydrophobic amino acids with a lot of alanine, valine and leucine. <ref>[https://www.uniprot.org/uniprot/P70406] UniProtKB - P70406 UCP2_MOUSE <ref/>