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Figure S3. Hematoxylin and eosin staining of thymic sections of newborn mice. (A) Lig4^-/- p53^p/p thymus shows less cellular density, in clear contrast to the WT (B) and Lig4^-/-p53^-/- (C) thymus, but similar to the density in thymus from Artemis^-/- mice (D).