In vertebrates, these molecules are the proteins myoglobin and hemoglobin. Red blood cells (above) contain hemoglobin. Blood is bright red (left), due the presence of oxy-hemoglobin. Hemoglobin (or haemoglobin, frequently abbreviated as Hb), which is contained in red blood cells, serves as the oxygen carrier in blood.he iron atom in heme binds to the 4 nitrogen atoms in the centre of the porphyrin ring, but this leaves two free bonding sites for the iron, one on either side of the heme plane. The heme group is located in a crevice in the myoglobin molecule, surrounded by non-polar residues except for two polar histidines.
Generally speaking, to work in public health, a masterâs degree is required as bare minimum. This is because this is the kind of education that ensures the graduates are ready to take on true leadership roles, advocating for patientsâ rights and performing advanced research.
Admissions Requirements. Students need a Master of Public Health (MPH) in order to be accepted into a Ph.D. program. Students who do not meet this requirement generally must complete MPH courses after enrollment but prior to beginning the Ph.D. program. Students enrolled in the public health Ph.D. program must also complete a dissertation.