Indicate the role each protein plays in the junction. Choose a phrase from the bank at the bottom and match it with the correct protein listed:
1. Connexin
2. E-cadherin
3. Desmocollins
4. Desmotubule
5. Desmoplakin
6. Annulus
7. alpha-Catenin
8. Claudins
Phrase Bank:
a. the desmosomal cadherins that probably bind the plasma membranes of the two cells,
b. transmembrane adhesive connections between two adjacent animal cells, binds adjoining cells together or creating fused ridges,
c. forms channels (cytoplamic connections) between adjacent animal cells,
d. anchors actin microfilaments to the plasma membrane,
e. tubular structures found in the center of a plasmodesma,
f. forms channel (cytoplasmic connections) between adjacent animal cells,
g. major proteins of the desmosome plaque

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.

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