WormMine: ExpressionPattern Expr12867

• Pattern: GFP expression appeared in the seam cells at the very beginning of the L4 stage and continued on through adulthood. GFP was never seen in the seam cells before the L3-to-L4 transition in a wild-type background (100%, n 80 animals). Seam cell expression of let-7::gfp is significant as let-7 is normally required for seam cell development. Nontemporally regulated GFP expression was observed in other parts of the worm, including the pharynx, intestinal cells, muscle cells, and neurons.
• Primary Identifier: Expr12867

5 Anatomy Terms

Definition	Name	Synonym	Primary Identifier
the feeding organ, a neuro-muscular pump in the head of the animal, used to ingest food, bacteria suspended in liquid, filter them out, grind them up and transport posteriorly into the instestine.	pharynx	esophagus	WBbt:0003681
Major cell type of nervous tissue, specialized for transmission of information in the form of patterns of impulses.	neuron	neurone	WBbt:0003679
Contractile cell that makes up muscle tissue.	muscle cell		WBbt:0003675
a group of hypodermal cells that lie along the apical midline of the hypodermis, at the extreme left and right sides between nose and tail	seam cell	lateral hypodermis	WBbt:0005753
any of 20 large epithelial cells which form a tube and are mostly situated as bilaterally symmetric pairs around the tubular lumen. Each of these cell pairs forms an intestinal ring ( II-IX int rings). The most anterior intestinal ring (int ring I), however, is made of four cells. Intestinal cells contain large nuclei with large nucleoli and numerous autofluorescent granules in their cytoplasm.	intestinal cell		WBbt:0005792

1 Genes

WormBase Gene ID	Gene Name	Sequence Name	Organism
WBGene00002285	let-7	C05G5.6	Caenorhabditis elegans

2 Life Stages

Remark	Definition	Other Name	Public Name	Primary Identifier
	The fourth stage larva. At 25 Centigrade, it ranges 40-49.5 hours after fertilization, 26-35.5 hours after hatch.		L4 larva Ce	WBls:0000038
	The stage that begins when a C.elegans individual is fully-developed and has reached maturity.		adult Ce	WBls:0000041