Can a polyclonal AB distinquish between two very similar proteins

[Jaishree Muppala Chittoor]

Hi,
Can a polyclonal AB raised against a synthetic peptide (MNLAPLDT) be able
to distinguish between a protein with this sequence and a protein that 
shows >70% sequence identity with it.  This other protein has SNLAPVDT as its 
sequence at the corresponding region.
Thanks in advance.
bye
Jaishree
[jaishre at matt.ksu.edu]