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Unformatted text preview: tbook !Figure*5.19*page*107*for*diagram Transport Proteins Gardiner 2013 !*uniport:*primary*transport*pumps
!symport*and*antiport!*secondary*transport*pumps 1202B 10:25 BIOLOGY 1. Uniport – single solute carried across
membrane by transport protein
2. Symport – two different solutes carried
across membrane at same time in
same direction by transport protein
3. Antiport – two different solutes carried
across membrane in opposite direction
by transport protein 35 !&One&red&molecule&from&the&inside&is&transferred&across&
1202B Uniport – single solute carried across
membrane by transport protein 10:25 Gardiner 2013 the&pink&membrane&into&the&other&space 36 12 BIOLOGY
1202B Symport – two different solutes carried across
membrane in same direction by p rotein. 10:25 Gardiner 2013 37 !*Two*solutes*carried*across*but*in*opposide*directions
!K*travels*into*the*cell 1202B Antiport – two different solutes carried across
membrane in opposite directions by protein.
10:25 Gardiner 2013 38 Exocytosis and endocytosis transport large
• Large molecules, such as polysaccharides and
proteins, cross the membrane via vesicles. !Endo&and&exco&cytosis&allow&the&import&and&export&of&
passing&through&the&plasma&membrane • During exocytosis, a transport vesicle budded
from the Golgi apparatus is moved by the
cytoskeleton to the plasma membrane.
• When the two membranes come in contact, the
bilayers fuse and spill the contents to the outside.
10:25 Gardiner 2013 39 !Exocytosis&e...
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