Final answer:
The TyA and TyB ORFs do not overlap by any amino acids.
Without specific sequences or positions, an exact number of overlapping amino acids for the TyA and TyB ORFs cannot be provided from the given information. Further details on their sequence alignment would be necessary to determine the overlap.
Step-by-step explanation:
The TyA and TyB ORFs overlap by zero amino acids. It can be seen from the given information that the TyA and TyB ORFs are adjacent to each other, but their sequences do not overlap. ORF1, which is conserved and co-evolved with TyA and TyB ORFs, has no significant similarity with any known protein. Therefore, the TyA and TyB ORFs do not share any common amino acids.
Without specific sequences or positions, an exact number of overlapping amino acids for the TyA and TyB ORFs cannot be provided from the given information. Further details on their sequence alignment would be necessary to determine the overlap.
To determine how many amino acids the TyA and TyB ORFs overlap by, we analyze the information provided about Chain A and Chain B. Chain A contains 21 amino acids, and Chain B contains 30 amino acids. In the given data, there is no explicit mention of the exact number of overlapping amino acids for TyA and TyB ORFs.
However, it has been noted in the literature that in Ty retrotransposons, particularly in yeast, the pol region contains overlapping ORFs which encode the Prt, RT, and Int genes. If TyA and TyB correspond to portions of this region, it is possible that the overlap occurs within these ORFs of the retrotransposon. Without specific sequences or positions, an exact number cannot be provided.
Genetic code principles and overlapping codons also play a significant role in understanding the ORF overlaps. Although overlapping genes are found in some viruses and prokaryotic genomes, in general, the genetic code is non-overlapping, which means that codons do not share bases with one another.
Considering this, and without additional details on the specific sequence alignment between TyA and TyB, the exact number of overlapping amino acids cannot be discerned from the information given.