Description: Recombinant Human TGF beta 4 Protein is produced by E.coli expression system and the target gene encoding Met1-Ser155 is expressed. Form: Lyophilized from a 0.2 μm filtered solution of 20mM Tris, 150mM NaCl, pH7.5. Gene Symbol: LEFTY1 Alternative Names: LEFTB; LEFTYB; Left-right determination factor 1; Left-right determination factor B; Protein lefty-1; Protein lefty-BEntrez Gene (Human): 10637SwissProt (Human): O75610Purity : Greater than 95% as determined by reducing SDS-PAGE.Chemical Structure : MAAGSITTLP ALPEDGGSGA FPPGHFKDPK RLYCKNGGFF LRIHPDGRVD GVREKSDPHI KLQLIAEERG VVSIKGVCAN RYLAMKEDGR LLASKSVTDE CFFFERLESN GYNTYRSRKY TSWYVALKRT GQYKLGSKTG PGQKAILFLP MSAKS Directions 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.