Physical Localization of the Mesoderm Development (mesd) Functional Region |
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Authors: | Mary E. Wines Ying Shi Mirlene Lindor Bernadette C. Holdener |
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Affiliation: | Institute for Cell and Developmental Biology, Department of Biochemistry and Cell Biology, State University of New York at Stony Brook, Stony Brook, New York, 11794-5215 |
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Abstract: | The mesoderm development (mesd) functional interval is essential for primitive streak formation and mesoderm induction. Mesd is defined by overlapping albino (c) deletions on chromosome 7. We have constructed a bacterial artificial chromosome (BAC) contig that spans the mesd functional region. BAC end-sequence identifies three segments that recognize novel expressed sequences. Localization of the proximal breakpoints from Del(7)Tyrc−3YPSd and Del(7)Tyrc−112K within the contig defines a deletion interval of 310–350 kb that is essential for mesd function. Importantly, using BAC transgene rescue, we define a 75-kb mesd critical region containing at least one expressed sequence. |
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