Description：Recombinant Human IgG4 Fc Protein is produced by mammalian expression system and the target gene encoding Pro104-Lys327 (Leu325Pro) is expressedForm：Lyophilized from a 0.2 μm filtered solution of 20mM PB, 150mM NaCl, pH7.4.Gene Symbol：IGHG4Alternative Names：Ig gamma-4 chain C region Entrez Gene (Human)： 3503; SwissProt (Human)： P01861; Purity：Greater than 95% as determined by reducing SDS-PAGE.Chemical Structure：PPCPSCPAPE FLGGPSVFLF PPKPKDTLMI SRTPEVTCVV VDVSQEDPEV QFNWYVDGVE VHNAKTKPRE EQFNSTYRVV SVLTVLHQDW LNGKEYKCKV SNKGLPSSIE KTISKAKGQP REPQVYTLPP SQEEMTKNQV SLTCLVKGFY PSDIAVEWES NGQPENNYKT TPPVLDSDGS FFLYSRLTVD KSRWQEGNVF SCSVMHEALH NHYTQKSLSL SPGKDirections for Use：Always centrifuge tubes before opening. Do not mix by vortex or pipetting. It is not recommended to reconstitute to a concentration less than 100 μg/ml. Dissolve the lyophilized protein in ddH2O. Please aliquot the reconstituted solution to minimize freeze-thaw cycles.Quality Control：Endotoxin: Less than 0.1 ng/µg (1 IEU/µg) as determined by LAL test.Storage/Stability：Lyophilized protein should be stored at -20°C, though stable at room temperature for 3 weeks. Reconstituted protein solution can be stored at 2-8°C for 2-7 days. Aliquots of reconstituted samples are stable at -20°C for 3 months.