Alignment methods

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Alignment methods October 16, 2012 Return Quiz 1 today Return homework on Thursday. Homework from last week due on Thursday Learning objectives- Needleman Wunsch Global Alignment program. New Homework exercises #5 and #6 from Chapter 5.

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Alignment methods. October 16, 2012 Return Quiz 1 today Return homework on Thursday. Homework from last week due on Thursday Learning objectives- Needleman Wunsch Global Alignment program. New Homework exercises #5 and #6 from Chapter 5. Three steps. Initialization Matrix fill Traceback. - PowerPoint PPT Presentation

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Page 1: Alignment methods

Alignment methodsOctober 16, 2012Return Quiz 1 todayReturn homework on Thursday.Homework from last week due on ThursdayLearning objectives- Needleman Wunsch Global Alignment program.New Homework exercises #5 and #6 from Chapter 5.

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Three steps

Initialization

Matrix fill

Traceback

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Alignment A Sequence 1: ADCDN-R-CKCRWP Sequence 2: AWC-NDRQCLCR-P Score: 10101010101101Total Score: 8Alignment B Sequence 1: ADC-DNR-CKCRWP Sequence 2: AWCND-RQCLCR-P Score: 10101010101101Total Score: 8

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A W C N D R Q C L C R P

A 1

D 1

C 1 1 1

D 1

N 1

R 1 1

C 1 1 1

K

C 1 1 1

R 1 1

W 1

P 1

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Matrix fill

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Traceback

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W(L) = gL equation 5.1where g is the cost of a single gap.

Affine gap penaltyW(L) = gopen + gext(L) equation 5.2

Total score = equation 5.3

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Modified N-W Global alignment with linear gap penalty

Sequence 1: ADCDN (vertical sequence)Sequence 2: AWCN (horizontal sequence)

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