A portion of plant substance (PO:0025161) that is the inner layer of a plant cuticle (PO:0000022), and is composed of a polyester matrix of hydroxy- and hydroxy epoxy fatty acid C16 and C18 chains.
Source:PMID:12467640,
POC:curators
Comment
Cutin is the insoluble, covalently cross-linked polymer that forms an electron dense layer over the epidermal cells (PO:0004013) of an aerial plant structure.