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Published byGeorgia Hutchinson Modified over 9 years ago
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P1-1 Cell diagram 3P 1-1
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Chromatin to DNA From chromosome to chromatin to solenoid to DNA
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P3-2 Chromosome to DNA 3P3-2 Chromosomes
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P3-2 Backbone chemistry 3P3-2 1 23 4 5 O 5 3
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4F4-4
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3F2-10 4F4-3
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8-30 chromatin 3F8-30
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4F4-21 2 linked copies of a chromosome during mitosis Tangle of chromatin spilling out of lysed nucleus
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Central Dogma Transcription mRNA Gene (DNA) Translation Protein Transcription Reverse Transcription
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exons
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27Kbp 300Kbp Gene Ex1Ex2 Intron1 Intron2 145bp 2500bp 5 ’ UTR 3 ’ UTR JUNK???
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3-12,13 DNA replication 4F5-5 DNA Synthesis Template, 3’ 5’ New, 5’ 3’ 4F5-3
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CELL CYCLE: Gap1, Synthesis, Gap2, Mitosis ….
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proteins- chain of AA O -- C NH3+NH3+ H C R1R1 O C NHNH H C R2R2 O C NHNH H C R3R3 O C NHNH H C R4R4 O R1R1 R2R2 R1R1 R2R2 Peptide bond
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CRAMBIN: N = 46 TTCCPSIVARSNFNVCRLPGTPEALCATYTGCIIIPGATCPGDYAN Peptide bond,crambin
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3-35 3-35 primary to quaternary
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4F6-8 4F6-9 3F3-19
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4F6-6
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TATA Transcription Start Site G9.17
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4F6-19
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The Gene Network of E.Coli: (bacterium, single cell) (U. Alon)
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p53 CDE / E2F CHR ELK1 NFY CDK4 CDK6 CDKN1A (p21) E2F RB NFY CDKN2A (p16) Mitogens MAPK ELK 1 1.M.Milyevsky,Y.Tabach, ….T.Pilpel,V. Rotter – in vitro 2. C. Rosty,M. Sheffer, D.Tsafrir….in vivo, cervical cancer CDK2 Cervical cancer induced by HPV: two viral oncoproteins (E6,E7) are inserted in DNA and expressed. They inactivate p53 and Rb and induce proliferation Inactivation by E7 binding Degradation Induced by E6
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4F6-21
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3-16 Genetic code 3 READING FRAMES
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beta-globin(human)sequences VHLTP(EEKSAVTALW){GK} VN(VDEVGGEALGRLLVV)Y (PWTQRF)F(ESF)GDLST (PDAVM){G}N (PKVKAHGKKVLGAFSDGL) {AH}(LDNLKGTFATLSELHCD) {KL}HVD{P} (ENFRLLGNVLVCVLAHHFGKE)FT (PPVQAAYQKVVAGVANALA) {HK}YH
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3FtRNA
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6-8,9 tRNA 6-8,9
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4F6-653FtRNA
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4F6-58 4F6-60
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polyribosome 3F6-28,29
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Central Dogma Transcription mRNA Cells express different subset of the genes In different tissues and under different conditions Gene (DNA) Translation Protein
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