An 8-residue polypeptide was determined to have the followin…

An 8-residue polypeptide was determined to have the following amino acid composition: (Met)2, Phe, Pro, Gln, Arg, Gly, Tyr.  The first-round of Edman degradation released PTH-Gly.  Both trypsin treatment and CNBr treatment yielded a tripeptide and a pentapeptide, respectively (with different sequences).  Digestion with chymotrypsin (note: only consider cleavage next to aromatic amino acids) produced a tetrapeptide, a tripeptide and a free methionine.  The amino acid sequence of this octapeptide should be:

Both Cabeza de Vaca and Mary Rowlandson describe their own c…

Both Cabeza de Vaca and Mary Rowlandson describe their own captivities among foreign peoples. Begin by identifying the audiences of each writer and their approximate time period and cultural context (such as predominant cultural values and beliefs).  Then analyze how each writer narrates his/her captivity in ways that either reinforce or challenge the dominant cultural beliefs of their intended audience. As you respond, be sure to describe details of the captivity. (You obviously won’t have access to the version of Cabeza de Vaca that you read for class.  However, you can find a portion of Cabeza de Vaca’s Relación starting on p 55 of the NA. It is also alright to rely solely on your memory of this text without direct citations.)