Figure 2From: A novel serine hydroxymethyltransferase from Arthrobacter nicotianae: characterization and improving catalytic efficiency by rational designMultiple sequence comparison by ClustalW. (a) a part of the sequence alignment result (81-160 sites); (b) a part of the sequence alignment result (161-240 sites); (c) a part of the sequence alignment result (241-320 sites). Open boxes indicate the four highly conserved regions and the conserved active site is underlined. The site-directed mutagenesis site is underlined and is marked by five-pointed star. The amino acid sequences were obtained from NCBI database (http://www.ncbi.nlm.nih.gov/).Back to article page