Assertion: ngf's activity | /r/CapableOf | increase in the presence of ng f
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Source sentences:
text: Analysi s of the metabolic ac tivity of the PC12 cells 24 h after seeding (d ay 1) indicated that the m etabolic activity of the cells increased in the presence of NG F, however, when cells were incubated on a PLL - coated substratum, an increase in metabolic activity was not observed.