Shohreh Vafai

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Phosphoprotein phosphatase 2A (PP2A) is a major phosphoserine/threonine protein phosphatase in all eukaryotes. It has been isolated as a heterotrimeric holoenzyme composed of a 65 kDa A subunit, which serves as a scaffold for the association of the 36 kDa catalytic C subunit, and a variety of B subunits that control phosphatase specificity. The C subunit is(More)
L OCATING THE skin-background boundary is important as the first step of a system to assist radiologists in detecting and assessing breast abnormalities. A global grey value threshold was previously used L,~ to segment the image into foreground and background, followed by operations to trace and smooth the boundary between the two regions. Figure 2 shows(More)
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