(1) Sippel, A.E. (1973) Eur. J. Biochem. 37, 31-40
(2) Beltz, W.R. and Ashton, S.H. (1982) Fed. Proc. 41, 1450, Abstract 68996
(3) Krug, M.S., and Berger, S.L. (1986) Anal. Biochem. 153, 315-323
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