3.6.1.42 DNA and amino acid sequence determination and analysis, functional complementation of a Saccharomyces GDPase null mutant 3.6.1.42 DNA sequence determination and analysis, enzyme can complement and restore activity in Saccharomyces cerevisiae deletion mutant gda1, complementation of N-glycosylation defects 3.6.1.42 expressed in HEK-293 cells 3.6.1.42 GDA1 gene 3.6.1.42 normal and transforming PCPH proteins: PCPH, PCPH proto-oncogene and mt-PCPH, PCPH oncogene having guanosine diphosphatase activity 3.6.1.42 normal and transforming PCPH proteins: PCPH, PCPH proto-oncogene and mt-PCPH, PCPH oncogene having guanosine diphosphatase activity, expression in Escherichia coli BL21, DE3 3.6.1.42 overexpression in Schizosaccharomyces pombe, functional complementation of a Saccharomyces cerevisiae enzyme mutant defective in chitinase O-mannosylation 3.6.1.42 overexpression of GDA1 gene