The appearance of a neurotrophin due to biosynthesis or secretion by cells in a neuron's target field, resulting in an increase in its intracellular or extracellular levels. A neurotrophin is any of a family of growth factors that prevent apoptosis in neurons and promote nerve growth. [GOC:ecd, GOC:mah, GOC:mtg_MIT_16mar07]
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C5: Ontology GO: Gene Ontology GO:BP: GO Biological Process