Equations 3b and 3c, which utilize abbreviations for terms in eq 3a, are correct as written. This error does not affect any of the data or conclusions in the paper.

A novel maltogenic amylase from Bacillus stearothermophilus ETI, which has a dual activity of u-l,4-and a-l,6-glycosidic bond cleavages and u-l,6-glycosidic bond formation, was crystallized by using the hanging-drop vapor-diffusion method. The best crystals were obtained by employing a high concentration of protein (56mgml '1) and a precipitant containing 22% glycerol, 1.6 M ammonium sulfate in 0.1 M Tris-HCI (pH 8.5). Native diffraction data to 2.66 A resolution have been obtained from crystals flash-frozen at 110 K. The crystals belong to the space group P2~212~ with unit-cell dimensions of a = 77.62, b = 121.23, c = 244.29 A, and contain three or four protomers per asymmetric unit. Structure determination by multiple isomorphous replacement is in progress.