Carrier Proteins Carrier protein-mediated: Facilitated diffusion: 1)Bind with solute specifically and change the conformation; 2)Diffusion rate is influenced by the concentration gradient and the number of carrier protein; 3)Downhill,does not need ATP. Active transport: 1)Uphill,need ATP; 2)The carrier has the specificity and variability. This document is produced by trial version of Print2Flash.Visit www.print2flash.com for more information