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Expression Pattern :

Pattern  The last expression component to appear is in certain cells of the somatic gonad. The D-cells of the vulval labia and unidentified cells of the spermathecal structures begin expression in L4, whilst gonadal morphogenesis is ongoing. The D-cells do not express beyond the first oocyte fertilisations (no zygotes are usually visible when these cells are stained), the spermathecal staining lasting slightly longer into adulthood The next stage at which expression is evident is during the elongation phase of late embryogenesis when the worm is approximately 2 fold. The nuclei of the M2 motor neurones in the terminal bulb of the pharynx stain strongly. More pharyngeal cells show expression as morphogenesis proceeds until at hatching the two I1 interneurones of the metacorpus, either the e2 or m2 cells of the procorpus, and the m8 muscle cell at the pharyngeal-intestinal boundary can all be seen. This pattern remains through the rest of the life cycle, although the m8 expression is lost during early larval stages These early larval stages also see the appearance of expression in the tail region. The nuclei of the anal sphincter cell and 3/4 neuronal cells of the posterior ganglia comprise this regional component of the pattern This gene gives rise to a complicated multicomponent developmental expression pattern. Earliest expression is seen during the cleavage stage of embryogenesis, in the clonal descendants of the E blastomere, the founder cell giving rise the whole of the gut of the adult animal. Expression begins in Ea and Ep just after gastrulation, and continues into each of the granddaughters of these two cells. At this stage, the expressing cells clearly outline the emerging form of the gut. This component ends at about the 150/200 cell stage Primary Identifier  Expr21
Remark  50-70 cell embryo(author) = 51-cell embryo(curator). early embryo(author) = blastula + gastrulating embryo(curator). fragment altered 7/97, at request of IHope late embryo(author) = 2-fold embryo(curator). life_stage summary : each cell-group has different pattern
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24 Anatomy Terms

Definition Name Synonym Primary Identifier
an accordion-like tube that contains sperm and is the site of oocyte fertilization. spermatheca   WBbt:0005319
neuron with its cell body situated in the tail, posterior to rectum. tail neuron   WBbt:0006759
a saddle-shaped muscle cell that encircles the intestinal-rectal valve anal sphincter muscle lineage name: ABprpppppap WBbt:0005798
Pharyngeal interneurons: ant sensory, input from RIP I1L lineage name: ABalpapppaa WBbt:0004746
Pharyngeal interneurons: ant sensory, input from RIP I1R lineage name: ABarapappaa WBbt:0004745
adult vulval toroid cell, D, formed by fusion of precursors of lineage names P5.ppp and P7.paa. vulD   WBbt:0006766
eighth pharyngeal muscle cell layer (single cell) pm8 lineage name: MSaaapapp WBbt:0004302
embryonic cell Ep   WBbt:0006612
embryonic cell Ea   WBbt:0006733
Neuron class of one pharyngeal motorneuron. M4 neuron lineage name: MSpaaaaaa WBbt:0004467
second layer pharyngeal muscle cell. pm2 m2 WBbt:0003742
pharyngeal epithelial cell, type 2. e2   WBbt:0003716
embryonic cell Eal   WBbt:0006441
embryonic cell Ear   WBbt:0006370
embryonic cell Epra   WBbt:0006321
embryonic cell Eara   WBbt:0006161
embryonic cell Epr   WBbt:0006547
embryonic cell Ealp   WBbt:0006546
embryonic cell Eprp   WBbt:0006507
embryonic cell Eplp   WBbt:0006496
embryonic cell Epla   WBbt:0006661
embryonic cell Earp   WBbt:0006646
embryonic cell Eala   WBbt:0006104
embryonic cell Epl   WBbt:0006000

1 Genes

WormBase Gene ID Gene Name Sequence Name Organism
WBGene00006768 unc-32 ZK637.8 Caenorhabditis elegans

11 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 100-290min after first cleavage at 20 Centigrade. Proliferate from 28 cells to 421 cells. Referring to the whole period of gastrulation. gastrulating embryo Ce WBls:0000010
  The C. elegans life stage spanning 460-520min 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 is elongated and double fold. A stage between 1.5-fold embryo and 3-fold embryo. 2-fold embryo Ce WBls:0000019
  The C. elegans life stage spanning 0-100min after first cleavage at 20 Centigrade. Proliferate from 1 cell to 28 cells. From first cleavage until the start of gastrulation. blastula embryo Ce WBls:0000005
  The stage when an animal shifts from L4 larva to adult. It includes the synthesis of new cuticle, cease of phrayngeal pumping during a lethargus stage, and the shed off of old cuticle. L4-adult molt Ce WBls:0000040
  The C. elegans life stage spanning 120-135 min after first cleavage at 20 Centigrade. Contains 51 cells. 51-cell embryo Ce WBls:0000011