This prediction has been given a low confidence score. The sequences used to make the prediction were too closely related.
The SIFT software is generously provided by Pauline Ng, Ph. D.
For more information see the SIFT website, http://blocks.fhcrc.org/sift/SIFT.html, or
SIFT: Predicting deleterious substitutions, Ng, P.C. and Henikoff, S. (2001) Genome Research 11: 863-874