Hereditary anemia known as sickle cell disease (SCD) results from inheritance of a variant form of β-globin protein (βS), rather than the wild-type β-globin protein (βA). Which of the following did Linus Pauling find following gel electrophoresis of hemoglobin protein from individuals with the following three genotypes: βAβA, βAβS, or βSβS?
◦ the lane containing the hemoglobin from the heterozygote (βAβS) individual had two protein bands with differing electrophoretic mobility
◦ the lane containing the hemoglobin from the homozygous (βAβA) individual had two protein bands with differing electrophoretic mobility
◦ the lane containing the hemoglobin from the homozygous (βSβS) individual with SCD had two protein bands
◦ all three lanes had the same two protein bands with the same electrophoretic mobility
◦ all three lanes had just one protein band with the same electrophoretic mobility
The Lyme disease tick
Human embryonic stem cell colony and iPS colony
Sample Student Externship Form
IgM only, then IgD and IgM on the surface of a B cell.
The mitochondrion is the center of energy transformation in the cell