WormMine: ExpressionPattern Expr4342

• Pattern: In first stage larvae (L1) of both sexes, ceh-22b::VENUS expression was not detected in SGPs(somatic gonadal precursor) at hatching, but became visible midway through the first larval stage (L1). After the SGP divided, the intensity of the reporter began to increase in distal SGP daughters (Z1.a and Z4.p) and began to diminish from proximal SGP daughters (Z1.p and Z4.a). In hermaphrodites, both progeny of the distal SGP daughter retained robust ceh-22b::VENUS expression through L2 or early L3. In males, the distal SGP daughter, which does not divide further, retained strong expression until L3; the expression decreased during L4. The ceh-22b::VENUS reporter was also expressed in the pharynx, intestine, and ventral nerve cord as well as in unidentified neurons in the head and tail. Expression in the pharynx and intestine was sustained throughout larval development into adulthood; expression in the ventral nerve cord was visible until L3.
• Primary Identifier: Expr4342

7 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 large process bundle that runs along the vental mid-line extending from the ventral region of the nerve ring.	ventral nerve cord	ventral cord	WBbt:0005829
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
neuron with its cell body situated in the head, excluding the pharynx.	head neuron		WBbt:0006751
neuron with its cell body situated in the tail, posterior to rectum.	tail neuron		WBbt:0006759
cell, posterior descendent of Z4, in hermaphrodite.	Z4.p hermaphrodite		WBbt:0007024
cell, anterior descendent of Z1, in hermaphrodite.	Z1.a hermaphrodite		WBbt:0007022

1 Genes

WormBase Gene ID	Gene Name	Sequence Name	Organism
WBGene00000445	ceh-22	F29F11.5	Caenorhabditis elegans

5 Life Stages

Remark	Definition	Other Name	Public Name	Primary Identifier
	The second stage larva. At 25 Centigrade, it ranges 25.5-32.5 hours after fertilization, 11.5-18.5 hours after hatch.		L2 larva Ce	WBls:0000027
	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 third stage larva. At 25 Centigrade, it ranges 32.5-40 hours after fertilization, 18.5-26 hours after hatch.		L3 larva Ce	WBls:0000035