"Synaptophysinisa38kDaglycoproteinpresentinthemembraneofneuronalpresynapticvesiclesinbrain,spinalcord,retina,vesiclesofadrenalmedulla,neuromuscularjunctions,andendocrinecells.Itisalsoexpressedbyneuroendocrinecellsthroughoutthebody,bothnormalandneoplastic.SynaptophysinisausefulMarkerfortheidentificationofnormalneuroendocrinecellsandneuroblatomas.ItisalsosUSPectedtoplayaroleinRespiratoryDisorders(i.e.sleepapnea)andLewyBodyNeurodegenerativeDiseases."
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