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Mech Dev. 2000 Oct;97(1-2):177-82.

Sfrp-1 and sfrp-2 are expressed in overlapping and distinct domains during chick development.

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Department of Biology, San Francisco State University, San Francisco CA 94132, USA.


Secreted frizzled related proteins (Sfrps) are thought to bind and regulate Wnt activity through a cysteine rich domain that is highly similar to that of Frizzled receptors. To investigate possible roles for Sfrps in chick development, we have isolated partial cDNAs encoding Sfrp-1 and Sfrp-2 and have thoroughly characterized the expression patterns of both genes. Both sfrp-1 and sfrp-2 are expressed at all stages of development analyzed, ranging from Hamburger and Hamilton stage 4 through stage 32. Expression of both sfrp-1 and sfrp-2 is observed in mesodermal and ectodermal derivatives, while sfrp-1 is also found in endodermal lineages.

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