<!--Discussion-->
The track reaches its widest extent in 
the human muscle elasticity protein, <A HREF="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;list_uids=11717165&amp;dopt=Abstract"
TARGET=_blank>titin</A>, the largest known mammalian protein. This protein
is comprised of 38,138 residues and 363 exons, and has a  molecular weight 
of 4200 kDa. 

