flippydoodle:Irving Geis’ illustration of the hemoglobin tetramer. (Irving Geis Collection, Howard H
flippydoodle:Irving Geis’ illustration of the hemoglobin tetramer. (Irving Geis Collection, Howard Hughes Medical Institute).via Brain Pickings: Happy Birthday, Irving Geis - His Pioneering Scientific Illustrations & Imaginary Flight Paths to Venus -- source link
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