Xochella Chan

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Overexpression of the anti-apoptotic Bcl-2 family proteins occurs commonly in human cancers. Bfl-1 is highly expressed in some types of malignant cells, contributing significantly to tumor cell survival and chemoresistance. Therefore, it would be desirable to have chemical antagonists of Bfl-1. To this end, we devised a fluorescence polarization assay (FPA)(More)
Tissue-nonspecific alkaline phosphatase (TNAP) is a ubiquitous enzyme expressed at high levels in bone, liver, and kidney. It appears involved in dephosphorylation of numerous phosphate monoesters, but only 2 of them, pyrophosphate and pyridoxal phosphate, have yet been unequivocally documented. Discovery and characterization of other substrates could be(More)
The hematopoietic protein tyrosine phosphatase (HePTP) is implicated in the development of blood cancers through its ability to negatively regulate the mitogen-activated protein kinases (MAPKs) ERK1/2 and p38. Small-molecule modulators of HePTP activity may become valuable in treating hematopoietic malignancies such as T cell acute lymphoblastic leukemia(More)
Protein tyrosine phosphatases (PTPs) have only recently become the focus of attention in the search for novel drug targets despite the fact that they play vital roles in numerous cellular processes and are implicated in many human diseases. The hematopoietic protein tyrosine phosphatase (HePTP) is often found dysregulated in preleukemic myelodysplastic(More)
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