Table 4.

Summary of sub-mitochondrial localizations (annotated and predicted) of the 4307 mitochondrial proteins

Class/Species	Human	Mouse	Yeast	Fly	Arabidopsis	Overall
Outer membrane	151	93	82	34	85	445
Inner membrane	441	354	321	288	386	1790
Intermembrane space	62	31	77	28	31	229
Matrix	412	293	231	323	638	1897
Total	1066	771	711	673	1140	4361 (a)

^(a)The total count is greater than 4307 because of the presence of multi-localizing proteins