Patterns of TE-EST presence in different maize organs and conditions. Lines represent different TE families grouped by classes, and columns different organs and conditions. Numbers are the normalized values of EST abundance. Background colours indicate the TE abundance as indicated by the colours scale. Marker genes are: alpha zein 19 kDa (Acc.Number: J01244), female gametophyte-specific protein ES1 precursor (ES1, Acc.Num. AF180131), male gametophyte-specific 2 (mgs2, Acc.Num. L20139) and phosphoenolpyruvate carboxylase 1 (PEP1, Acc.Num. X15238).