Table 1. Yield (mg of protein/Liter of culture) of NGF and proNGF after scaling-up process.

Protein	Scale of culture(L)	Yield ProNGF (mg/L)	Yield NGF (mg/L)
hNGF	10	35	16
hNGF P61S	10	24	12
hNGF R100E	10	9.3	1.6
hNGF P61S R100E	10	8.3	3.5