[Photo: Maggie Hoffman] A fifth of all of the wine grapes planted in Germany are riesling, so to talk about German wine, you have to start with this iconic grape. There's a lot to love: Riesling can taste like peach or apricot, with a bolt of lime-like tartness. It's also incredibly aromatic, all jasmine and honeysuckle.
Hemoglobin is responsible for transporting oxygen from lungs to other parts of the body, where the oxygen can be used by other cells. Oxy-hemoglobin (HbO2) is the bright red hemoglobin that is a combination of hemoglobin and oxygen from the lungs.A hemoglobin molecule can carry a maximum of four oxygen molecules.emoglobin is responsible for transporting oxygen from lungs to other parts of the body, where the oxygen can be used by other cells. Oxy-hemoglobin (HbO2) is the bright red hemoglobin that is a combination of hemoglobin and oxygen from the lungs. A hemoglobin molecule can carry a maximum of four oxygen molecules.
So, the curve has an s-shape because, at lower PO2s, oxygen binds to hemoglobin at a high rate, and this slows down as hemoglobin become more saturated. At PO2s above 60 the curve is relatively flat, meaning that the oxygen content of the blood will not change much with subsequent increases in PO2. Shift to the left: The curve shifts to the left when hemoglobin has an increased affinity for oxygen, and has an easier time making the bond with oxygen. 2  Higher SpO2 for a given PO2. 3  Hemoglobin is more likely to cling to O2 and not let go (activity is minimal). 4  Think Cold.