  In our recent investigation (Lim et al. 2015), we have shown that narrow-band
photometry can be combined with low-resolution spectroscopy to effectively
search for globular clusters (GCs) with supernovae (SNe) enrichments. Here we
apply this technique to the metal-poor bulge GC NGC 6273, and find that the red
giant branch stars in this GC are clearly divided into two distinct
subpopulations having different calcium abun- dances. The Ca rich subpopulation
in this GC is also enhanced in CN and CH, showing a positive correlation
between them. This trend is identical to the result we found in M22, suggesting
that this might be a ubiquitous nature of GCs more strongly affected by SNe in
their chemical evolution. Our results suggest that NGC 6273 was massive enough
to retain SNe ejecta which would place this cluster in the growing group of GCs
with Galactic building block characteristics, such as {\omega} Centauri and
Terzan 5.
