Before revision:  In this work we investigate how gene conservation, essentiality and functional repertoire are reflected in the connectivity k of the corresponding proteins in the PPI networks  of 42 evolutionarily unrelated bacterial species .
After revision:  In this work we investigate how gene conservation, essentiality and functional repertoire are reflected in the connectivity k of the corresponding proteins in the PPI networks . Focusing on a set of 42 evolutionarily unrelated bacterial species .