Submitted by György Chityil ... on Fri, 01/19/2018 - 23:54 Hierarchy: NounDescription: {{protein}} Any of a class of photoreceptor flavoproteins that mediate phototropism in higher plants.Ngram: phototropinNgram Text: phototropinSource: WiktionaryIssue: 0Wiktionary tag: proteinNgram Count: 1