Replication protein A 30KDA subunit (RPA4), partial, human, recombinant

Organism: Homo sapiens (Human). Source: E.coli. Expression Region: 1-260aa. Protein Length: Partial. Tag Info: N-terminal 6xHis-tagged. Target Protein Sequence: MSKSGFGSYG SISAADGASG GSDQLCERDA TPAIKTQRPK VRIQDVVPCN VNQLLSSTVF DPVFKVRGII VSQVSIVGVI RGAEKASNHI CYKIDDMTAK PIEARQWFGR EKVKQVTPLS VGVYVKVFGI LKCPTGTKSL EVLKIHVLED MNEFTVHILE TVNAHMMLDK ARRDTTVESV PVSPSEVNDA GDNDESHRNF IQDEVLRLIH ECPHQEGKSI HELRAQLCDL SVKAIKEAID YLTVEGHIYP TVDREHFKSA. Purity: Greater than 90% as determined by SDS-PAGE. Endotoxin: Not test. Biological Activity: n/a. Form: Liquid or Lyophilized powder. Buffer: If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0. Reconstitution: We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20 °C/-80 °C. Our default final concentration of glycerol is 50%. Customers could use it as reference. Storage: The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself. Generally, the shelf life of liquid form is 6 months at -20 °C/-80 °C. The shelf life of lyophilized form is 12 months at -20 °C/-80 °C. Notes: Repeated freezing and thawing is not recommended. Store working aliquots at 4 °C for up to one week. Relevance: As part of the alternative replication protein A complex, aRPA, binds single-stranded DNA and probably plays a role in DNA repair. Compared to the RPA2-containing, canonical RPA complex, may not support chromosomal DNA replication and cell cycle progression through S-phase. The aRPA may not promote efficient priming by DNA polymerase alpha but could support DNA polymerase delta synthesis in the presence of PCNA and replication factor C (RFC), the dual incision/excision reaction of nucleotide excision repair and RAD51-dependent strand exchange. Reference: Rpa4, a homolog of the 34-kilodalton subunit of the replication protein A complex.Keshav K.F., Chen C., Dutta A.Mol. Cell. Biol. 15:3119-3128(1995). Function: As part of the alternative replication protein A complex, aRPA, binds single-stranded DNA and probably plays a role in DNA repair. Compared to the RPA2-containing, canonical RPA complex, may not support chromosomal DNA replication and cell cycle progression through S-phase. The aRPA may not promote efficient priming by DNA polymerase alpha but could support DNA polymerase delta synthesis in the presence of PCNA and replication factor C (RFC), the dual incision/excision reaction of nucleotide excision repair and RAD51-dependent strand exchange.