WormMine: ExpressionPattern Expr117

• Pattern: Expression begins in embryos but staining cells have not been specifically identified. Staining is usually seen in a pair of nuclei, a group of four nuclei or two groups of four nuclei. In comma stage embryos a pair of posterior nuclei express. In L1 larvae two nuclei stain. One located behind the pharynx, and one near the tail. Mosaicism is evident, as sometimes we see both, other times only the anterior nuclei or the posterior nuclei. In older larvae we see a large nucleus expressing in the head and either 2 nuclei or a group of four nuclei, or both, expressed in the posterior of the worm. Adults show 2 components-- the four most anterior intestinal nuclei stain and the posterior nuclei stain, the second component involves reproducible staining in some small nuclei in the head, and sometimes in the tail.
• Primary Identifier: Expr117
• Remark: Other strain-- UL369

2 Anatomy Terms

Definition	Name	Synonym	Primary Identifier
Epidermal layer.	hypodermis	epidermis	WBbt:0005733
any of 20 large epithelial cells which form a tube and are mostly situated as bilaterally symmetric pairs around the tubular lumen. Each of these cell pairs forms an intestinal ring ( II-IX int rings). The most anterior intestinal ring (int ring I), however, is made of four cells. Intestinal cells contain large nuclei with large nucleoli and numerous autofluorescent granules in their cytoplasm.	intestinal cell		WBbt:0005792

1 Genes

WormBase Gene ID	Gene Name	Sequence Name	Organism
WBGene00018904	pycr-4	F55G1.9	Caenorhabditis elegans

7 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
	The C. elegans life stage spanning 390-420min 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 looks like a comma. A stage between bean embryo and 1.5-fold embryo.		comma embryo Ce	WBls:0000017