Erratum

Volume 150, No. 2 (1972), in the article, ‘Studies on Adenosine Triphosphatc Transphosphorylases. XI. Isolation of the Crystalline Adenosine Triphos- phate-Creatine Transphosphorylases from the Muscle and Brain of Man, Calf, and Rabbit; and a Preparation of their Enzymatically Active Hybrids,” by H. J. Keutel, K. Okabe, H. K. Jacobs, F. Ziter, L. Maland, and S. A. Kuby, pp. 648- 678 :

P. 651, right column, line 8 from bottom, should read: k:,, = k’(H+)“=+. P. 664, right column, last line, should read: “in a volume of 0.01 &f EDTA4.01 M P-mer-

captoethanol, pH 8.2.” P. 673, right column, line 3 from bottom, should read: “69-t)imes larger for the brain en-

zyme than for the muscle enzyme.” P. 674, right column, line 2 from the bottom, should have read, “this ratio becomes almost

500 [i.e., 10/(2.0 X 10-2)], in favor of the noticeably unstable brain enzyme.” P. 675, left column, line 19 from the top, should have read, Ic:,, = k’(H+)““+.

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