Aminotransferase study ofNeurospora crassa ser-3 versus wild type ST4A

Summary TheNeurospora crassa serine auxotrophser-3 and the wild type ST4A were compared with respect to their phosphoserine and serine aminotransferase activities. The results obtained indicate no deficiency of either of these enzymes in the mutant strain.This work was supported in part by a grant to D.G. from the California Foundation for Biochemical Research. The authors also wish to thank Dr Robert G. Wolcott, formerly of the Department of Chemistry, California State University, Northridge, for his valuable advice and for the use of his department's liquid scintillation counting system. We acknowledge with appreciation the skilled technical assistance of Mr Tom Harper.