Glucose transporter expression and regulation following a fast in the ruby-throated hummingbird, Archilochus colubris

Raafay Syed Ali, Morag F. Dick, Saad Muhammad, Dylan Sarver, Lily Hou, G. William Wong & Kenneth C. Welch
Hummingbirds, subsisting almost exclusively on nectar sugar, face extreme challenges to blood sugar regulation. The capacity for transmembrane sugar transport is mediated by the activity of facilitative glucose transporters (GLUTs) and their localisation to the plasma membrane (PM). In this study, we determined the relative protein abundance of GLUT1, GLUT2, GLUT3, and GLUT5 via immunoblot using custom antibodies in whole-tissue and PM fractions of flight-muscle, heart, and liver of ruby-throated hummingbirds (Archilochus colubris). GLUTs examined...
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These counts follow the COUNTER Code of Practice, meaning that Internet robots and repeats within a certain time frame are excluded.
What does this mean?