Figure 2.

Engineered vaccine candidate against non-glycosylated receptor binding domain of COVID-19 (SARS-CoV-2). The designed vaccine candidate is in the sequential manner like- Adjuvant-PADRE sequence-CTL epitopes-HTL epitopes-B-cell epitopes. In the vaccine sequence, the initial 45 amino acids are occupied by an adjuvant (Black color), followed by next 6 amino acids of EAAAK linker (Red color), then from number 51–167 amino acids represent the CTL epitopes (Blue color) whereas 168–367 and 368–487 are covered by HTL epitopes (Green color) and B-cell epitopes (Brown color), respectively. All the linkers have been represented in red color.