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The quail-chick chimeric system. A schematic representation of heterospecific transplantation of the neural crest tissue common to chimeric lineage tracing. The dorsal part of the neural tube of the quail, containing the neural crest cells, is excised and interchanged into a chick host of a comparable embryonic stage at the same locus. 1: somite 1, 2: somite 2, OV: otic vesicle. Image obtained with permission from TP Kelder & R Vincente-Steijn et al. [48].
