Slc22a3 (solute carrier family 22 (organic cation transporter), member 3; Orct3; Oct3; EMT) shows
maternal-specific expression in the placenta at 11.5 dpc, but biallelic expression at 15.5 dpc.
Adult tissues did not show imprinting (Zwart
R et al, 2001).
Slc22a2 imprinting requires the presence of the imprinted paternally expressed Air RNA (Sleutels
F et al, 2002; Sleutels
F et al 2003).
Okae H et al, (2012) confirmed
imprinted maternal expression of this gene in placenta and trophoblast stem cells (TS).