positive regulation of 1-phosphatidyl-1D-myo-inositol 4,5-bisphosphate biosynthetic process
positive regulation of 1-phosphatidyl-1d-myo-inositol 4,5-bisphosphate biosynthetic process
Any process that activates or increases the frequency, rate or extent of 1-phosphatidyl-1D-myo-inositol 4,5-bisphosphate biosynthetic process.