Protein coding sequences/Selection markers

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Selection markers are protein coding sequences that confer a selective advantage or disadvantage to host chassis. For example, a common type of prokaryotic selection marker is one that confers resistance to a particular antibiotic. Thus, cells that carry the selection marker can grow in media despite the presence of antibiotic. Most plasmids contain antibiotic selection markers so that researchers can ensure that the plasmid is maintained during cell replication and division. (Cells that lose a copy of the plasmid will soon either die or fail to grow in media supplemented with antibiotic.) A second common type of selection marker, often termed a positive selection marker, are those that are toxic to the cell. Positive selection markers are frequently used during cloning to select against cells transformed with the cloning vector and ensure that only cells transformed with a plasmid containing the insert.


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NameProteinDescriptionTagDirectionUniProtKEGGLengthStatus
BBa_J31006TetA(C)-bkwtetracycline resistance protein TetA(C) (backwards) [cf. BBa_J31007]P02981 1191In stock
BBa_J31005CATchloramphenicol acetyltransferase (forwards, CmF) [cf. BBa_J31004]P62577none660In stock
BBa_J31007TetA(C)tetracycline resistance protein TetA(C) (forward), [cf. BBa_J31006] P02981 1191In stock
BBa_K1021003 bar (bialaphos resistance)  552In stock
BBa_K1071001 ble resistance (eucaryotic)  375In stock
BBa_K1323011 Erythromycin resistance coding sequence  735In stock
BBa_K1323012 Spc - Spectinomycin Resistance Gene Coding Sequence  783In stock
BBa_K1323013 aadD - Kanamycin Resistance Gene Coding Sequence  726In stock
BBa_K1313004 Neomycin Resistance  786In stock
BBa_T9150PyrForotidine 5NoneForwardP08244eco:b1281;741It's complicated
BBa_J31002AadA-bkwkanamycin resistance backwards (KanB) [cf. BBa_J23012 & BBa_J31003]P0AG05none816It's complicated
BBa_J31003AadA2kanamycin resistance forward (KanF) [cf. BBa_J23012 & BBa_J31002]P0AG05none816It's complicated
BBa_J31004CAT-bkwchloramphenicol acetyltransferase (backwards, CmB) [cf. BBa_J31005]P62577none660It's complicated
BBa_K143031 Aad9 Spectinomycin Resistance Gene  771It's complicated
BBa_K156011 aadA (streptomycin 3'-adenyltransferase)  789It's complicated
BBa_K389005 Kanamycin resistance  819It's complicated
BBa_K394000 Resistance Gene for G418 in Yeast  813It's complicated
BBa_K678040 pyrG cassette, for selection of Aspergillus nidulans  1456It's complicated
BBa_K678041 pyrG-DR cassette, for selection of Aspergillus nidulans  2168It's complicated
BBa_K678042 hygromycin cassette for Aspergillus nidulans  1363It's complicated
BBa_K678044 bleR cassette, selection marker for Aspergillus nidulans  1663It's complicated
BBa_K678045 ptrA, selection marker for Aspergillus nidulans  1899It's complicated
BBa_K823020catchloramphenicol acetyltransferase (cat)  645It's complicated
BBa_K1207001 Macrolide-Lincosamide-Streptogramin B Resistance Marker  735It's complicated
BBa_T9000 aacC2Forward  861It's complicated
BBa_K2799001 nat1  573It's complicated
BBa_K4056001 ereB - Erythromycin esterase type II  1263 
BBa_K4047016 Gentamicin resistance (GmR) for Synechococcus  534 
BBa_K4047019 Kanamycin Resistance for Synechococcus  816 
BBa_K4235003 Gentamicin Resistance Gene  534 
BBa_K4235018 Ampicillin Resistance Gene  861 
BBa_K1015002 streptmycin resisitance gene (can PCR ampicillin resistance gene primer)  1031Not in stock
BBa_K1073000 ampicillin resistance  864Not in stock
BBa_K1015009 Chloramphenicol resistance gene+FRT  1098Not in stock
BBa_K1015010 Ampicillin resistance gene  983Not in stock
BBa_K3046028 PyrG CDS from Aspergillus fumigatus  906Not in stock
BBa_K3629011 Nourseothricin resistance gene  573Not in stock