Appendix B | MPAM Mapping Algorithm
321
For each strand, there are seven offset position options for the probe
quartet pairs (-4, -2, -1, 0, +1, +3, +4). Five offsets are chosen,
selected to give the best results for the particular SNP being tested.
The MPAM Algorithm
GTYPE uses MPAM, a model-based algorithm, to determine which
allele is present at a particular SNP in the sample. Models of the RAS
values for each SNP and Genotype were developed by testing samples
from approximately 100 different individuals of different ethnicities
on the 10K mapping array (see
Model Description, on page 325
The MPAM mapping algorithm uses the following steps:
2.
Extract Median Relative Allele Signal (RAS) for Sense and
Antisense directions for the SNP (see
Figure B.2
Offset interrogation positions
The cells in a particular probe set are distributed on the
10K
mapping array and may not be physically located next to each
other.
C C C C A C T A A T A C
T
T G G A T G A T A A A T
Reference
Sequence
Probe
Sequences
. . . T A G G G G G T G A T T A T G
A
A C C T A C T A T T T A G G A . . .
C C C C C A C T A A T A
C
T T G G A T G A T A A A
C C A C T A A T A C T T
G
G A T G A T A A A T C C
1
+2
0
offset
SNP site
= changed base/interrogation position
GTYPE_manual.book Page 321 Wednesday, August 2, 2006 11:31 AM
Summary of Contents for iServer MicroServer iTHX-M
Page 9: ...Introduction GTYPE_manual book Page 1 Wednesday August 2 2006 11 31 AM...
Page 10: ...GTYPE_manual book Page 2 Wednesday August 2 2006 11 31 AM...
Page 19: ...Chapter 1 GTYPE Overview GTYPE_manual book Page 11 Wednesday August 2 2006 11 31 AM...
Page 20: ...Chapter 1 GTYPE_manual book Page 12 Wednesday August 2 2006 11 31 AM...
Page 55: ...Chapter 2 Getting Started GTYPE_manual book Page 47 Wednesday August 2 2006 11 31 AM...
Page 56: ...Chapter 2 GTYPE_manual book Page 48 Wednesday August 2 2006 11 31 AM...
Page 85: ...Chapter 3 Working with Images GTYPE_manual book Page 77 Wednesday August 2 2006 11 31 AM...
Page 86: ...Chapter 3 GTYPE_manual book Page 78 Wednesday August 2 2006 11 31 AM...
Page 114: ...Chapter 4 GTYPE_manual book Page 106 Wednesday August 2 2006 11 31 AM...
Page 145: ...Chapter 5 Mapping Analysis Window GTYPE_manual book Page 137 Wednesday August 2 2006 11 31 AM...
Page 146: ...Chapter 5 GTYPE_manual book Page 138 Wednesday August 2 2006 11 31 AM...
Page 188: ...Chapter 6 GTYPE_manual book Page 180 Wednesday August 2 2006 11 31 AM...
Page 259: ...Chapter 7 Universal Tag Window GTYPE_manual book Page 251 Wednesday August 2 2006 11 31 AM...
Page 260: ...Chapter 7 GTYPE_manual book Page 252 Wednesday August 2 2006 11 31 AM...
Page 269: ...Chapter 8 Probe Intensity Window GTYPE_manual book Page 261 Wednesday August 2 2006 11 31 AM...
Page 270: ...Chapter 8 GTYPE_manual book Page 262 Wednesday August 2 2006 11 31 AM...
Page 283: ...Chapter 9 NetAffx Annotations GTYPE_manual book Page 275 Wednesday August 2 2006 11 31 AM...
Page 284: ...Chapter 9 GTYPE_manual book Page 276 Wednesday August 2 2006 11 31 AM...
Page 297: ...Chapter 10 Reports GTYPE_manual book Page 289 Wednesday August 2 2006 11 31 AM...
Page 298: ...Chapter 10 GTYPE_manual book Page 290 Wednesday August 2 2006 11 31 AM...
Page 314: ...Appendix A GTYPE_manual book Page 306 Wednesday August 2 2006 11 31 AM...
Page 325: ...Appendix B MPAM Mapping Algorithm GTYPE_manual book Page 317 Wednesday August 2 2006 11 31 AM...
Page 326: ...Appendix B GTYPE_manual book Page 318 Wednesday August 2 2006 11 31 AM...
Page 344: ...Appendix C GTYPE_manual book Page 336 Wednesday August 2 2006 11 31 AM...
Page 362: ...Appendix D GTYPE_manual book Page 354 Wednesday August 2 2006 11 31 AM...
Page 385: ...Appendix E Mapping Tool Algorithms GTYPE_manual book Page 377 Wednesday August 2 2006 11 31 AM...
Page 386: ...Appendix E GTYPE_manual book Page 378 Wednesday August 2 2006 11 31 AM...
Page 393: ...Appendix F IUPAC Base Codes GTYPE_manual book Page 385 Wednesday August 2 2006 11 31 AM...
Page 394: ...Appendix F GTYPE_manual book Page 386 Wednesday August 2 2006 11 31 AM...
Page 397: ...Appendix G File Types GTYPE_manual book Page 389 Wednesday August 2 2006 11 31 AM...
Page 398: ...Appendix G GTYPE_manual book Page 390 Wednesday August 2 2006 11 31 AM...
Page 402: ...Appendix H GTYPE_manual book Page 394 Wednesday August 2 2006 11 31 AM...
Page 405: ...Appendix I Hot Key Descriptions GTYPE_manual book Page 397 Wednesday August 2 2006 11 31 AM...
Page 406: ...Appendix I GTYPE_manual book Page 398 Wednesday August 2 2006 11 31 AM...
Page 409: ...Index GTYPE_manual book Page 401 Wednesday August 2 2006 11 31 AM...
Page 410: ...GTYPE_manual book Page 402 Wednesday August 2 2006 11 31 AM...