The PCR products from the tissues of laying hens fed diets containing control corn (CC) and phytase transgenic corn (PTC) for 16 weeks.

<p>(a) The endogenous gene (396 bp) of poultry for <i>ov</i> (left), (b) The exogenous gene (678 bp) of PTC for <i>phy</i>A2 (right). Arrows indicate the expected length of PCR products. M = marker; Lanes 1∼6 = blood, heart, liver, spleen, kidney, breast muscle of CC-fed laying hens (control); lanes 7∼12 = blood, heart, liver, spleen, kidney, breast muscle of PTC-fed laying hens; − = negative control (no DNA).