[Term] id: PR:000000105 name: nodal protein def: "A TGF-beta-like cystine-knot cytokine that is a translation product of the human NODAL gene or a 1:1 ortholog thereof. The nodal and lefty genes form positive and negative regulatory loops that resemble the reaction-diffusion system. As a pair, these genes control various events of vertebrate embryonic patterning, including left-right specification and mesoderm formation." [PRO:CNA] comment: Category=gene. synonym: "NODAL" EXACT PRO-short-label [PRO:DNx] xref: PIRSF:PIRSF037400 property_value: has_archetype PR:Q96S42 is_a: PR:000000008 ! TGF-beta-like cystine-knot cytokine