The Original Pichia Expression Kit includes 10 µg each of pHIL-D2 and pPIC3.5 vectors for intracellular expression and pHIL-S1 and pPIC9 vectors for secreted expression, Pichia pastoris strains GS115 (his4), KM71(arg4 his4 aox1::ARG4), control strain GS115 Albumin, control strain GS115 β-gal, media (YP and YNB), Spheroplast Transformation Kit, and 2 µg each 5´ AOX1, 3´ AOX1, and α-factor sequencing primers. Store vectors and primers at -20°C. Store strains at room temperature. All components are guaranteed stable for 6 months when properly stored.