Slit design of the JWST program GO 1835 (PI: Cantalupo) targeting the MQN01 protocluster field (see text for details of the slit location selection). The composite false-color image of the field was created with HST F814W (0.8 μm; blue), JWST F150W2 (1.5 μm; green), and JWST F322W2 (3.2 μm; red). The JWST/NIRSpec slit apertures are indicated by green rectangles. The dashed contours show the galaxy overdensity (Galbiati et al. 2025). The distribution of samples identified from MUSE observations (Galbiati et al. 2025), Chandra X-ray observations (Travascio et al. 2025), and ALMA (Pensabene et al. 2024) are also included. The sample of identified star-forming galaxies detected with emission lines is marked with cyan circles. Galaxies with X-ray emission are marked as orange circles. A quiescent galaxy serendipitously found with the JWST NIRSpec observations (Wang et al. 2026) is marked with a red circle.