43. Muthana, S.; Yu, H.; Huang, S.; *Chen, X.
Chemoenzymatic synthesis of size-defined polysaccharides by sialyltransferase-catalyzed block transfer of oligosaccharides.
J. Am. Chem. Soc. 2007129, 11918-11919. [Supporting information]

42. Chokhawala, H. A.; Cao, H.; Yu, H.; *Chen, X.
Enzymatic synthesis of fluorinated mechanistic probes for sialidases and sialyltransferases.
J. Am. Chem. Soc2007129, 10630-10631. [Supporting information]

41. Lewis, A. L.; Cao, H.; Patel, S. K.; Diaz, S.; Ryan, W.; Carlin, A. F.; Thon, V.; Lewis, W. G.; Varki, A.; Chen, X.; Nizet, V.
NeuA sialic acid O-acetylesterase activity modulates O-acetylation of capsular polysaccharides in Group B Streptococcus
J. Biol. Chem. 
2007282, 27562-27571.

40. Li, Y.; Sun, M.; Huang, S.; Yu, H.; Chokhawala, H. A.; Thon, V.; *Chen, X.
The Hd0053 gene of Haemophilus ducreyi encodes an alpha2,3-sialyltransferase. 
Biochem. Biophys. Res. Commun. 
2007361, 555-560.

39. Yu, H.; Chokhawala, H. A.; Varki, A.; *Chen, X.
Efficient chemoenzymatic synthesis of biotinylated human serum albumin-sialoglycoside conjugates containing O-acetylated sialic acids. 
Org. Biomol. Chem. 
20075, 2458-2463.

38. Ni, L.; Chokhawala, H. A.; Cao, H.; Henning, R.; Ng, L.; Huang, S.; Yu, H.; *Chen, X.; *Fisher, A. J.
Crystal structures of a Pasteurella multocida sialyltransferase complexes with acceptor and donor analogs reveal substrate binding sites and catalytic mechanism. 
200746, 6288-6298.

37. Yu, H.; *Chen, X.
Carbohydrate post-glycosylational modifications. 
Org. Biomol. Chem. 
20075, 865-872. [Cover Picture]

36. Huang, S.; Yu, H.; *Chen, X.
Disaccharides as unusual sialic acid aldolase substrates: novel synthesis of disaccharides containing a sialic acid at the reducing end.
Angew. Chem. Int. Ed. 200746, 2249-2253[Supporting information]

35. Chokhawala, H.; Yu, H.; *Chen X.
High-throughput substrate specificity studies of sialidases using chemoenzymatically synthesized sialoside libraries. 
Chem. Bio. Chem
. 20078, 194-201[Supporting information]

34. Chokhawala, H.; *Chen X.
Chemical aspects (scope and limitations) A: Enzymatic approaches to O-glycoside introduction: Glycosyltransferases.
In Comprehensive Glycoscience, from Chemistry to Systems Biology (J. P. Kamerling, Ed.) Subject Editors: Geert-Jan Boons, YC Lee, Akemi Suzuki, Naoyuki Taniguchi, and Alphons G. J. Voragen. Elsevier, Oxford, UK, 2007. Invited review. 20071, 415-451.