12.珠蛋白基因表达的时空特异性 Yolk sac Liver Spleen Bone marrow 1830 183042 Prenatal age (weeks) Postnatal age (weeks) Chromosome 16 01a2 20 20 52E2-G0N8r1 Q2Y2-Hb F 8-HbA C。Y.Portland 8-Hb Az E-Gower 2 Fioure 13-1 Globin Chain Svnthesis 21 12. 珠蛋白基因表达的时空特异性