Four proteins, each containing a single polypeptide, are separated by SDS-PAGE: human cytochrome c (MW 13,000), human serum albumin (MW 67,000), bovine myoglobin (MW 16,890), and human apolipoprotein B (MW 513,000). Which one would show up as the band at the bottom of the gel?

Select one:

a. cytochrome c
b. apolipoprotein B
c. bovine myoglobin
d. serum albumin
e. can’t tell from the data provided.