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Mech Dev. 2001 Jul;105(1-2):153-6.

Expression of the receptor tyrosine kinase genes, Ror1 and Ror2, during mouse development.

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Department of Biomedical Regulation, Kobe University, School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, 650-0017, Kobe, Japan.


In mammals, the Ror-family receptor tyrosine kinases consist of two structurally related proteins, Ror1 and Ror2, characterized by the extracellular Frizzled-like cysteine-rich domain and membrane proximal kringle domains. As an attempt to gain insights into their roles in mouse development, expression patterns of Ror1 and Ror2 during early embryogenesis were examined and compared. Interestingly, at early stages, Ror1 and Ror2 exhibit similar expression patterns in the developing face, including the frontonasal process and pharyngeal arches, which are derived from cephalic neural crest cells. On the other hand, they exhibit different expression patterns in the developing limbs and brain, where the expression of Ror2 was detected broadly compared with that of Ror1. At a later stage, both genes are expressed in a similar fashion in the developing heart and lung, yet in a distinct manner in the brain and eye.

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