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Analyses of zebrafish meioc mutants revealed that spermatogonial stem cells with low rRNA transcription caused by nucleolar Piwil1 require Meioc to keep Piwil1 in cytoplasm for the upregulation of rRNA transcription necessary for differentiation.

Coordinated removal of Tbx3 and Tbx5 function alters the molecular features of the fast ventricular cardiac conduction system toward non-conduction working myocardium, illuminating transcriptional control of cardiac conduction system patterning.

Endocardial id2b integrates biomechanical cues to orchestrate valve formation and myocardial maturation during cardiac development.

Stochastic intrinsic fate decisions by planarian stem cells drive clonal expansion and reveal a straightforward, feedback‐independent mechanism for robust cell identity selection.

Formation of specialized ribbon synapses in sensory hair cells involves dynamic precursor movement, microtubule-guided transport, and precursor fusion, culminating in synapse assembly essential for hearing and balance.

A stable microtubule network and kinesin motors facilitate the formation of presynaptic ribbons in sensory hair cells in the zebrafish lateral line.