WormMine: ExpressionPattern Expr2021

• Pattern: This highly mosaic pattern has a number of components most of which are seen in only a small fraction of worms. Expression is seen from early embryo to adult stages. Strong diffuse expression is seen in the pharyngeal musculature, with other anterior expression in the intestine, and around the isthmus probably corresponding to the nerve ring. Expression is also seen in and around the vulva, in the vulval muscle cells (vm1 and vm2), and in vulC. Posterior expression around the rectum, probably in the sphincter muscles and anal depressor muscle. Expression is also seen in early embryos (approximately the 50 cell stage) in a number of cells possibly of the AB lineage.
• Primary Identifier: Expr2021
• Remark: Other strain-- UL968

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
female genital.	vulva		WBbt:0006748
type of cells that make up muscle layers in the pharynx.	pharyngeal muscle cell		WBbt:0005451
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
The passageway in the hindgut between the posterior intestine, the rectal valve and the opening to the exterior.	rectum		WBbt:0005773
a single, H-shaped cell which lies just above the anus and connects the roof of the anal canal to the dorsal bodywall; its contractions act to increase the size of the anal opening by lifting the roof of the rectum and hence facilitate expulsion of intestinal contents.	anal depressor muscle	dilator muscle	WBbt:0004292
a saddle-shaped muscle cell that encircles the intestinal-rectal valve	anal sphincter muscle	lineage name: ABprpppppap	WBbt:0005798

1 Genes

WormBase Gene ID	Gene Name	Sequence Name	Organism
WBGene00001081	dpy-22	F47A4.2	Caenorhabditis elegans

7 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
	The whole period of embryogenesis in the nematode Caenorhabditis elegans, from the formation of an egg until hatching.		embryo Ce	WBls:0000003
	The C. elegans life stage spanning 120-135 min after first cleavage at 20 Centigrade. Contains 51 cells.		51-cell embryo Ce	WBls:0000011