Source Methoda Species Expression/pmol mg−1
Luminal Totalb Abluminal
Relative to microvessel protein
Dick et al. [303] Cytochalasin B binding Rat, pig 69–80
Kalaria et al. [571] Cytochalasin B binding Human 42
Farrell and Pardridge [572] Immunogold e.m Rat 12%c 100%c 48%c
Cornford et al. [573] Immunogold e.m Human 48% 100% 18%
Vannucci et al. [574] Cytochalasin B binding Rat 40–125
Kamiie et al. [182] Proteomics Mouse 90
Uchida et al. [184] Proteomics Human 139
Shawahna et al. [176] Proteomics Human 78.5
Hoshi et al. [185] Lysate digestion proteomics Rat 84–98
Relative to membrane protein
Simpson et al. [575] Fractionation, cytochalasin B binding Bovine 620 280
Kubo et al. [58] Fractionation, proteomics Porcine 79% 21%
Zhang et al. [188] Proteomics Porcine 300