Consistent
lpr-1::GFP expression initiates immediately after the comma stage of embryogenesis and continues throughout the remainder of embryonic and larval development. At the three-fold stage of embryogenesis,
lpr-1::GFP is expressed within both the excretory duct cell and pore cell, and in G2, which adopts excretory pore cell function later in development. Authors observed no expression within the excretory canal cell.
lpr-1::GFP is also expressed in
hyp7, seam cells, and P cells, all of which are epidermal cell types that surround the excretory system.