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We present the homogeneous abundance analysis for a combined sample of 185giants in the bulge globular cluster (GC) NGC 6388. Our results are used todescribe the multiple stellar populations and differences or analogies withbulge field stars. Proton-capture elements indicate that a single class offirst-generation polluters is sufficient to reproduce both the extreme andintermediate parts of the anti-correlations among light elements O, Na, Mg, andAl, which is at odds with our previous results based on a much smaller sample.The abundance pattern of other species in NGC 6388 closely tracks the trendsobserved in bulge field stars. In particular, the alpha-elements, including Si,rule out an accreted origin for NGC 6388, confirming our previous results basedon iron-peak elements, chemo-dynamical analysis, and the age-metallicityrelation. The neutron-capture elements are generally uniform, although the[Zr/Fe] ratio shows an intrinsic scatter, correlated to Na and Al abundances.Instead, we do not find enhancement in neutron-capture elements for stars whosephotometric properties would classify NGC 6388 as a type II GC. Together withthe homogeneity in [Fe/H] we found in a previous paper, this indicates we needto better understand the criteria to separate classes of GCs, couplingphotometry, and spectroscopy. These results are based on abundances of 22species (O, Na, Mg, Al, Si, Ca, Ti, Sc, V, Cr, Mn, Fe, Co, Ni, Zn, Y, Zr, Ba,La, Ce, Nd, and Eu) from UVES spectra sampling proton-, alpha-, neutron-captureelements, and Fe-peak elements. For 12 species, we also obtain abundances in alarge number of giants (up to 150) from GIRAFFE spectra.

Chemistry of multiple stellar populations in the mono-metallic, in situ, bulge globular cluster NGC 6388