Drug combination sugar, amino acid

Vancomycin (mol. wt. about 1500) is a chlorinated polyphenyl ether antibiotic, having sugar and amino acid side-chains, and obtained from Streptomyces orientalis. For the molecular structure, see Sheldrick et al. (1978). It combines with the D-alanyl-D-alanine portion of the monomer awaiting polymerization to give new bacterial cell wall, and hence growing cells die by rupture of the plasma membrane (Anderson et al., 1965). This drug must be given intra-... 

A low calorie artificial sweetener which was approved for human consumption by the Food and Drug Administration (FDA) in mid-August 1981. It is manufactured by G. D. Searle and Company of Skokie, Illinois, and sold under a different brand name. Chemically, aspartame is the combination of the two amino acids, aspartic acid and phenylalanine—a dipeptide. It is about 180 times sweeter than table sugar. Therefore, it provides the same sweetness as sugar with fewer calories. Furthermore, it does not promote tooth decay, nor does it have an after taste. 

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