Με έγχρωμα, σφαιρικά μοντέλα, με την εμβρυϊκή αιμοσφαιρίνη να επισημαίνεται ως. Illustration showing the structural differences between fetal hemoglobin (HbF) and adult hemoglobin (HbA). The diagram features molecular representations of alpha (? ) and beta (? ) chains for adult hemoglobin and gamma (? ) chains for fetal hemoglobin? Each structure is represented by colored, spherical models, with the fetal hemoglobin labeled as having a higher oxygen affinity. The image highlights the transition of hemoglobin types from fetal to adult stages.