Bisulfate-bisulfate hydrogen bonds that are prevalent in the (G) 2 (A) 1 (SA) 2 and (G) 3 (A) 0 (SA) 2 clusters are retained in structures calculated at lower-tropospheric temperatures (Figures ), suggesting that this binding motif will probably play a role in the growth of such clusters. Sulfuric acid prefers to bind to sulfuric acid, ammonia, or the amino end of glycine while glycine prefers to bind to glycine or ammonia. This implies a preference for organic components to bond with one another and for inorganic components within the clusters to preferentially bind to other inorganic components. Such an arrangement can influence the selectivity of these clusters in accommodating incoming molecules during nucleation. To elaborate, an incoming inorganic species such as sulfuric acid is likely to bind to the free N-H groups and bisulfate O-H on the surface of such clusters, while an organic species such as dicarboxylic acid is likely to preferentially add to the side with free carboxylic O-H groups.