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Aldotetroses exist in the furanose form. Complete the following Haworth projections for both anomers of D-erythrose by assigning the groups to the correct positions. CHO H-OH HOH CH20H ?-D-erythrose ?-D-erythrose 1: 1: 2: 2:

For numbers 1-8 for alpha and beta

Alpha:

1:

2:

3:

4:

5:

6:

7:

8:

Beta:

1:

2:

3:

4:

5:

6:

7:

8:

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