Fig. 1

Stamp and μ-well dimensions (A, A’) Scheme showing a zebrafish embryo mounted classically, directly on the coverslip (A) and with μ-well (A’). B, B′ Top-view (B) and lateral view (B′) of a single μ-well with dimensions in mm. C Design and dimensions of the stamp. The base connects all parts and fits exactly a Ø 20 mm coverslip of a Ø 35 mm imaging dish. \( \overrightarrow{x} \) and \( \overrightarrow{y} \) are the distances between two adjacent μ-wells. Stabilizers were introduced as cornerstones and to make the structure more rigid. D For better handling, the stamp is mounted onto a countersunk screw