WormMine: ExpressionPattern Expr97

• Pattern: In some L1 larvae the cell body and process of the I3 interneuron show expression. Late larval stages and adults show expression in the large nuclei of the intestine. Staining is strongest in the posterior nuclei. Strong staining is seen in the muscle nuclei of the pharynx with diffuse staining also seen in the pharyngeal muscle. The cell body and part of the process of either the I6 interneuron or the M1 or M2 pharyngeal motoneuron stain as well. Other nuclei in the head and body show expression and these are probably neuronal. This pattern may be due to an incomplete promoter (0.8kb). b-galactosidase is first expressed in late embryonic stages, in nuclei that are most likely pharyngeal.
• Primary Identifier: Expr97
• Remark: Other strains injected with this plasmid are UL278 and UL279. The expression in these strains are consistent with that shown in UL280 but they are not as extensive.

5 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
type of cells that make up muscle layers in the pharynx.	pharyngeal muscle cell		WBbt:0005451
Major cell type of nervous tissue, specialized for transmission of information in the form of patterns of impulses.	neuron	neurone	WBbt:0003679
Neuron class of one pharyngeal interneuron, posterior sensory.	I6 neuron	I6	WBbt:0004739
Neuron class of one pharyngeal interneuron, anterior sensory.	I3 neuron	I3	WBbt:0004742

1 Genes

WormBase Gene ID	Gene Name	Sequence Name	Organism
WBGene00018274	F41C3.8	F41C3.8	Caenorhabditis elegans

6 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