The hemoglobin holoenzyme (active enzyme) is a complex of an iron ion and 4 subunits- 2 hemoglobin alpha and two hemoglobin beta. People with sickle cell disease have mutated beta hemoglobins. The mutation is a single nucleotide exchange, that changes the 6th amino acid of protein primary struture - a Glutamic acid into Valine. This one alteration changes the tree dimentional structure of hemoglobin beta so, that it forms lond fibres that disrupt the normal circular form of the red blood cells.

8 0

2 years ago

Using this passage, fill in the blank with either G1, G2, or G3. (1) All dogs are mammals. (2) All mammals are things with hair.

AleksandrR [38]

Answer:

Given the values for G1, G2, and G3, the blank spaces are filled below.

Explanation:

Assuming that

G1 = dogs

G2 = mammals

G3 = things with hair

Then

(A) All G1 are G2

(B) All G2 are G3

8 0

2 years ago

What should i name my parakeet? (its a make green one)

Anna [14]

Answer:

kiwi. :)

Explanation:

7 0

3 years ago