Beat Schumacher

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Agrin is a heparan sulfate proteoglycan that induces aggregation of acetylcholine receptors (AChRs) at the neuromuscular synapse. This aggregating activity is modulated by alternative splicing. Here, we compared binding of agrin isoforms to heparin, alpha-dystroglycan, and cultured myotubes. We find that the alternatively spliced 4 amino acids insert (KSRK)(More)
The p53 tumor suppressor promotes apoptosis in response to DNA damage. Here we describe the Caenorhabditis elegans gene ced-13, which encodes a conserved BH3-only protein. We show that ced-13 mRNA accumulates following DNA damage, and that this accumulation is dependent on an intact C. elegans cep-1/p53 gene. We demonstrate that CED-13 protein physically(More)
Genetical tests and DNA sequence analysis revealed that the mechanism of formation of IS1-induced type I and type II deletions differs. IS1-mediated type II deletions occur at the termini of the integrated element and do not remove the element. This process is independent of the cellular recA system and does not involve DNA sequence homology. Conversely,(More)
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