Clustal formatted tyrosyl tRNA synthetase sequence. The letter "A" denotes an α-helix, "B" a β-strand. The capital letters indicate that the automated secondary structure assignment (as annotated in the MMDB database) and the assignment by authors agreed while the lower case letter indicates that there was a disagreement.
Michalickova et al. BMC Bioinformatics 2002 3:32 doi:10.1186/1471-2105-3-32