Normal hemoglobin is a tetramer, consisting of two molecules of β hemoglobin and two molecules of α hemoglobin. In sickle-cell disease, as a result of a single amino acid change, the mutant hemoglobin tetramers associate with each other and assemble into large fibers. Based on this information alone, we can conclude that sickle-cell hemoglobin exhibits
A) altered primary structure.
B) altered secondary structure.
C) altered tertiary structure.
D) altered quaternary structure.
E) altered primary structure and altered quaternary structure; the secondary and tertiary structures may or may not be altered.
Normal female karyotype
A single base substitution leading to a single amino acid substitution in the hemoglobin beta chain
The normal and constricted airway.
IQ scores form what mathematicians call a normal distribution "bell curve"
People with normal color vision see the number 29 in the chart; however, those who are color-blind c
Distribution of dystrophin in muscle cells. (a) In normal muscle cells, all the dystrophin is locate