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Development of a Test System Based on Recombinant GM6 Antigen from Trypanosoma evansi for the Determination of Surra in Horses

Development of a Test System Based on Recombinant GM6 Antigen from Trypanosoma evansi for the Determination of Surra in Horses

Nurlan Akhmetsadykov1*, Tanatar Kydyrov2, Moldir Akhmetzhanova1, Gulnazi Akhmetova3, Maxat Berdikulov4 

Figure 1

Comparative analysis of trypanosomal antigen amino acid sequences isolated from T. evansi across various regions of Kazakhstan 

Figure 2

The amino acid sequence of GM6 isolated from T. evansi 

Figure 3

The nucleotide sequence of GM6 trypanosomal antigen gene isolated from T. evansi 

Figure 4

PCR results of E. coli clones transformed with pET28/GM6 carrying a trypanosomal antigen insert
Note: 1 – DNA markers; 2-19 – E. coli clones transformed with pET28/GM6. 

Figure 5

Determination of trypanosomal protein expression depending on time of incubation in IPTG
Note: 1 – cell lysate; 2 – supernatant after centrifugation of cell lysate; 3 – pellet after centrifugation of cell lysate; 4 – pellet of cell lysate without IPTG; 5 – cell lysate pellet after 6 hours’ incubation with IPTG; 6 – pellet of cell lysate after 18 hours’ incubation with IPTG; mm – molecular weights marker. 

Figure 6

Electrophoregram of purified preparations of trypanosomal antigen GM6
Note: 1-4 – Purified fractions of trypanosomal antigen; М – molecular weights marker. 

Figure 7

Immunoblotting of recombinant trypanosomal antigen GM6 T. evansi
Note: A – antibodies against 6-His; B – serum from trypanosomosis infected horse; 1 – recombinant GM6 protein prior to expression; 2 – recombinant GM6 protein after expression; M – molecular weights marker. 

Figure 8

Immunoenzymatic analysis of recombinant trypanosomal antigen with sera from diseased animals
Note: H1-H4 – serum of a horse experimentally infected with T. evansi trypanosomosis; H5-H8 – serum of a horse experimentally infected with T. equiperdum trypanosomosis; H9, H10 – serum of horses suffering naturally from trypanosomosis; D1-D5 – sera of donkeys suffering naturally from trypanosomosis.
 

Figure 9

Immunoenzymatic analysis of recombinant trypanosomal antigen with sera from healthy animals
Note: H11-18 – healthy horse serum; D7-15 – healthy donkey serum. 

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