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The Caenorhabditis elegans tra-3 gene promotes female development in XX hermaphrodites and encodes an atypical calpain regulatory protease lacking calcium-binding EF hands. We report that despite the absence of EF hands, TRA-3 has calcium-dependent proteolytic activity and its proteolytic domain is essential for in vivo function. These results indicate that proteolysis regulated by calcium may control some aspects of sexual cell fate in C. Proteolysis is an essential feature of all living cells and is responsible for eliminating proteins during normal degradative turnover and also when their activities are no longer required during processes such as cell cycle regulation and apoptosis Nunez et al. There is increasing evidence indicating that regulated or specialized proteolysis plays an important role in controlling gene expression, cell fate, and cytoskeletal architecture during development.

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High-throughput sequencing of cell-free DNA fragments found in human plasma has been used to non-invasively detect fetal aneuploidy, monitor organ transplants and investigate tumor DNA. However, many biological properties of this extracellular genetic material remain unknown. Research that further characterizes circulating DNA could substantially increase its diagnostic value by allowing the application of more sophisticated bioinformatics tools that lead to an improved signal to noise ratio in the sequencing data. We utilize a descriptive approach to examine how the biological cleavage of cell-free DNA affects different sequence signatures such as fragment lengths, sequence motifs at fragment ends and the distribution of cleavage sites along the genome.
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High-resolution characterization of sequence signatures due to non-random cleavage of cell-free DNA

The development of fishes is unique in some specific aspects compared to the development of other animals. Most bony fish eggs are referred to as telolecithal which means that most of the egg cell cytoplasm is yolk. The fish zygote is meroblastic, meaning the early cell divisions are not complete.
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