WormMine: ExpressionPattern Expr2407

• Pattern: After the comma stage in embryos, expression of VHA-6 changed. In 2-fold embryos, VHA-6 was limited to the intestine. Such intestinal expression was also observed in larvae and adults. The C. elegans intestine comprises a tube formed from 20 cells with microvilli on their apical surface. Furthermore, VHA-6 was clearly found at the junction between the pharynx and the intestine. VHA-6 was preferentially localized in dot-like structures in P2 cells of 4-cell stage embryos. Only single cells continued to express VHA-6 during further development. After the cleavage stage (~300 cells), when intestinal cells appear, VHA-6 was detected in two distinct cell types. These two cell types were aligned on both lateral sides at the comma stage. The expression pattern of VHA-6 was similar to the cell-specific distribution of P granules, which are passed onto a germ line cell lineage from P2 cells.
• Primary Identifier: Expr2407
• Subcellular Localization: VHA-6 was preferentially localized in dot-like structures in P2 cells of 4-cell stage embryos. VHA-6 was clearly detectable on the apical surface of intestinal cells, forming two lines along the worm body.

3 Anatomy Terms

Definition	Name	Synonym	Primary Identifier
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
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
embryonic founder cell	Psub2	lineage name: P0.pp	WBbt:0006873

1 Genes

WormBase Gene ID	Gene Name	Sequence Name	Organism
WBGene00006915	vha-6	VW02B12L.1	Caenorhabditis elegans

6 Life Stages

Remark	Definition	Other Name	Public Name	Primary Identifier
	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 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 whole period of embryogenesis in the nematode Caenorhabditis elegans, from the formation of an egg until hatching.		embryo Ce	WBls:0000003