WormMine: ExpressionPattern Expr11620

• Pattern: pfln-1::GFP expression begins in early L4 stage and continues through adulthood in the uterus, spermatheca, and proximal gonadal sheath. In addition to the somatic gonad, weak and variable GFP expression is evident in the posterior intestinal cells, anal depressor muscle, unidentified neurons, and the pharynx. Due to silencing of repetitive extrachromosomal arrays in the germline, we cannot exclude the possibility that fln-1 is also expressed in the germline.
• Primary Identifier: Expr11620

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
an accordion-like tube that contains sperm and is the site of oocyte fertilization.	spermatheca		WBbt:0005319
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
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
The organ in which the eggs are developed and protected until laid.	uterus		WBbt:0006760
Major cell type of nervous tissue, specialized for transmission of information in the form of patterns of impulses.	neuron	neurone	WBbt:0003679
five pairs of thin gonadal sheath cells form a single layer covering the germ line component of each arm, each pair occupying a stereotyped position along the gonad proximal-distal axis.	gonadal sheath cell		WBbt:0005828

1 Genes

WormBase Gene ID	Gene Name	Sequence Name	Organism
WBGene00022048	fln-1	Y66H1B.2	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