BMB 401 Lecture Notes - Lecture 5: Chemical Potential, Entropy, Aquaporin

• School: University of Miami
• Department: Biochemistry and Molecular Biology
• Course: BMB 401
• Professor: Farooq

Document Summary

If delta u < 0, net flow of a goes in and if delta u > 0, new flow of a goes out to ext side. If delta u = 0, no net movement, stuff in and out but cancels it out: more concentration, more energy it has, no test questions about this . 8: polar and charged stuff need facilitated transport to get across as cannot passively diffuse, need hydrophobic conduits or vehicles, under entropic control, no external energy input, free ride again. 9 3 kinds of facilitated transport: carriers: ionophore (to carry ions) carriers. Pick stuff up and shuttle stuff to either side due to concentration difference and then return unloaded: channels: ionophore channels, ion channels, porin channels, aquaporin channels. Form tunnels or pores to let stuff flow in: transporters: glucose transporters. Gated tunnels that open on one side, then close, then open on other side to let it out.