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Tachykinins with unusual structural features from a urodele, the amphiuma, an elasmobranch, the hammerhead shark, and an agnathan, the river lamprey

BiologyMyriapodaAxial SkeletonUnusual Structural FeaturesMorphological EvidenceNatural SciencesEvolutionary BiologyRiver LampreyAquatic OrganismAnatomyNervous SystemMarine BiologyMedicineHammerhead SharkSynapsida