Teaching JKPSC Lecturership Mock Test Series 2024-25 Life Sciences Methods in Biology Molecular Biology Techniques
Presence of selenocysteine in proteins in E. coli is a consequence of:
1
post-translational modification of cysteine present in special structural regions of the proteins by SelB and SelC.
2
post-translational modification of serine present in special structural regions of the proteins by SelB and SelC.
3
aminoacylation of a special tRNA (tRNAScCys) by serine tRNA synthetase with serine followed by further modification of the attached serine to selenocysteine followed by its transport to the ribosome by SelB
4
aminoacylation of a special tRNA (tRNAScCys) by serine tRNA synthetase with selenocysteine followed by its transport to ribosome by SelB.