WormMine: ExpressionPattern Expr12797

• Pattern: tat-2 reporter is first clearly detectable in 2-fold stage embryos in two sets of pharyngeal cells, the developing pharyngeal-intestinal valve and a set of cells in the posterior. By the first larval (L1) stage, GFP fluorescence also appears in the intestine. L4 and adult animals exhibit reporter signals in unidentified cells of the pharyngeal procorpus, the gland cells located in the posterior bulb of the pharynx, the pharyngeal-intestinal valve, rectal gland cells, the intestine and all cells of the excretory system. tat-2 reporter signals are also seen in L4 larvae in the primary vulval lineage vulE and vulF cells and in the proximal gonad. The vulval fluorescence vanishes and a moderately strong uterine signal appears after the uterine-vulval connection is complete in adults. The gonadal signal, emanating from spermatids, migrates to the spermatheca around the time of the first ovulation.
• Primary Identifier: Expr12797

12 Anatomy Terms

Definition	Name	Synonym	Primary Identifier
A chain of very large cuboidal cells forming a wide central lumen in which food arrives from the posterior pharynx, is digested, and from which waste products proceed to the rectum. Intestinal rings form in groups of two and four cells surrounding the common lumen; thus the epithelium is only one cell deep at any point, with neighboring cells firmly secured to their neighbors by apical adherens junctions. These cells have very large nuclei and many large vacuoles, yolk granules, and other inclusions; the latter increase in number and electron density as the animal ages.	intestine	gut	WBbt:0005772
A group of six equivalent cells forms a tightly constructed `valve` that links the posterior bulb of the pharynx to the anterior four cells of the intestine. These six cells comprise a small epithelial channel with a cuticular lining in continuity with the pharyngeal cuticle and link the lumen of the pharynx to the large lumen of the anterior intestine.	pharyngeal-intestinal valve	cardia	WBbt:0005767
an accordion-like tube that contains sperm and is the site of oocyte fertilization.	spermatheca		WBbt:0005319
The organ in which the eggs are developed and protected until laid.	uterus		WBbt:0006760
Secretory gland cell of the pharynx	Pharyngeal gland cell		WBbt:0005788
	pharyngeal cell		WBbt:0005460
	excretory system		WBbt:0005736
	rectal gland cell		WBbt:0005799
adult vulval toroid cell, F, formed by fusion of precursors of lineage names P6.papl, P6.papr, P6.ppal and P6.ppar.	vulF		WBbt:0006768
adult vulval toroid cell, E, formed by fusion of precursors of lineage names P6.paal, P6.paar, P6.pppl and P6.pppr.	vulE		WBbt:0006767
anterior section of pharyngeal corpus.	procorpus		WBbt:0003713
Anterior lobe of the bi-lobbed hermaphrodite gonad.	anterior gonad arm		WBbt:0005374

1 Genes

WormBase Gene ID	Gene Name	Sequence Name	Organism
WBGene00019166	tat-2	H06H21.10	Caenorhabditis elegans

4 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 first stage larva. At 25 Centigrade, it ranges 14-25.5 hours after fertilization, 0-11.5 hours after hatch.		L1 larva Ce	WBls:0000024
	The stage that begins when a C.elegans individual is fully-developed and has reached maturity.		adult Ce	WBls:0000041
	The C. elegans life stage spanning 460-520min after first cleavage at 20 Centigrade. Cell number remains at ~560 cells, with some new cells generated and some cells go through programmed cell death. The shape of embryo is elongated and double fold. A stage between 1.5-fold embryo and 3-fold embryo.		2-fold embryo Ce	WBls:0000019