Lecture5_Physics177_02Feb10

Lecture5_Physics177_02Feb10 - 42.182 I00 SHEETS...

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Unformatted text preview: 42.182 I00 SHEETS d/kwy’gral fr! 2776 MW 9/ C566 47/ 50w}: :c/ewf/g-z‘ 5b/t/Ml'cé W/ksc/wr /7/0 5 fromz Mam/the, 5;. Age/c, W24 (Imam; /)b(/I.HM mid—0 {I 2"“ + Aer £5 Pyr/M/oé'fim km + (fa/W ’0 / HaZOZ Fa»th : MM 4 Oflfl—M/c MW W m4; a dual ércgaq/rzx? may-M: 7224‘ RAM me/IEAAm/zzza a’ /flw/w ) 54:00:41 M W J7”? / ’ émé—i/ m 0/044. We %%4 @4/556 (Pypim‘m‘ua) LAéELLI‘A/é; ‘3 éZW .' PM? 7/1 5 / flm-h—é a ‘\) 9 , , . ////}W/té/M!: -——> ' . 7mU~€ \ g 42-182 100 SHEETS S “0,042 O 0H- q 7» Li I z( 0(+ oer Z‘OH. H [gimme—5" fl‘— LooxU- ri‘oau. (zxcec4siua(3 r‘vx (ZYcLugrfw/C'] {14, ((—0 CH; O / £12 , 0H_ 0H, d/Wau Dang mum. wa / , MA) (4 W5“) a“ 5144,0511) Q14) Qzéfl fif” 4 th$ruzh‘;ac&’l LJ/ 5' i WHM 3' 6‘4. W COMESij Molwsfotc Sl-adwwgtgw WFLWSPW ) M914) .__) 2:- gflwwxfiw wt P’Z/t‘moijwjlg, I 0 Q Low/4 bu»; nun-I MAL *‘h “ 42-182 2701445 fiCé/ltr& 42.162 ‘00 SHEETS Mud. In U.SA r *- NATIONAL . , l . M; $40 #4 1‘ ‘ A 32mph» mt“ (A a firm? wet ) “aw Pm. gt M king/(IL [lwfibw 4/; WW 1 o o ” l A “— 04$ + H+ R~oefivO-fi I: “’0‘? L - 01+ log/“:1 0’ 31:0 W ) 44404 9:414 gum .44. f g mw £044 a»; mum. ,4 WI ‘ m (“n/mow»; We fiaéé: Mia ., " W4 W M I I Figure 1-3. Schematic drawing of the DNA double helix. The sugar-phosphate backbones run at the periphery of the helix in antiparallel orientation. Base-pairs (A—T and G—C) drawn symbolically as bars between chains are stacked along the center of the helix. From (10). \J 01 42-182 100 SHEETS = cm, ,4,” 7155', we}: \ ., , . , I v . g » £4 /; l/ 2;, Q34» .' 5‘ to”. . 5/ “ix-Z, :— FM fU/K/Qé/i” airwaézéa W M24 tr D0 mz” /wak&, a, péoi‘mlal M-Jf (“fl/66% 2‘0 Hal/v _:g1a_fgf .952 x ,, W -, 57$ 4W (‘27 2271(7me / 37 9/1 lém, W fég/V/ 4/ W /:“¢ Jfg‘é’z’f, 114% W2, M W. lé 42.182 100 SHEETS nu: nun/A4. " r H;- _, | 0m 44;) gig"; 464.4%, flfrwczz‘z .- 5mm“ 02* a; (c 417ij EDIV/4 dam mt crfzué-u/ M Z9 WW (2% at Mfr/4&6 2? W45 W WW/ (2,4 MM? éW/ 2/4 7MW «’44? M W“ W 2% 6¢W, 677W 4%.” fl to 41%.: m zany“ 3.4-A spacing Figure 4-6 X-ray diffraction photograph of a hydrated DNA fiber (form B). The , central cross is diagnostic of a helical structure. The strong arcs on the I ~—- ~ meridian arise from the stack of base ' ’ L/I/O 556/4 ’9’ % pairs, which are 3.4 A'apart. [Cour- 463‘» & tesy\_of Dr. Maurice Wilkins] 5674wa W flécc W-% 21.- %é&afi4&4 M Mew [‘0 {014 W évy/ — Mr; 443? ' éfluda 4/7 /wn2;éo 3/ Mg/ fiat/flafi/ //’/€~ 1 My Zmé’w 4° flM Mia-5.4%] (/{oMM x, N ll are mmklw 42.132 100 SHFl'fS 77 Chapter 4 DNA AND RNA: MOLECULES OF HEREDITY Figure 4-7 Skeletal model of double-helical DNA. The structure repeats at inter- vals of 34 A, which corresponds to ten residues on each chain. Figure 4-8 Diagram of one ol. the strands of a DNA double helix, viewed down the helix axis. The bases (all pyrimidines here) are inside, whereas the sugar- phosphate backbone is outside. The tenfold symmetry is evident. 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E 7' firm 4, [47in 04mm” 2'”. déarac'f'z n'; 7’7C n2 6,}: amt; / 47? @9074 W /Z? M, anwzmamzf? (“mg/mart 3/ fl“ Afghan-rm) pith/245$ [175’ Mac/55%- X/vz? (El/107% mwf 41’7677454 fl; fife/t flgdfmf. IM 604/44 5.432% run; Wrodc'fiz Ina I“)? g 27 26(4)? (4,; mafia /~ H30 ). _%£ {/21 Wag a“. W? 5414.1 cwwcc74:fivfl l“- *- ./é/>Ms 4, AyfloféZ/ffiogj a»: nab/c174 dim/n («u/2% 2%! Jam leer of 112 mama—“‘5 2‘04)”; f’ég (poi/>741 dawn (4/), 6‘95" ow- 'A/ 7/74!” flimfltr é/wf/fl/ {fl1f{,h4fi;¢ / we Cth- a; fl/yMM/mr 74,5221 “’45? ’Jc‘r'né—g/ 644,171 mid/3%;er Ki?772u/réu/% 4,, La: : N’s 1:) A/b: y - J: g ' Fig. 9-4. Schematic two-dimensional diagram illustrating the representation 5 of relatively stifi' chains in terms or statistical lengths. All bonds have the l same bond length and bond angle. and the stiffness is represented schematically l / in terms of a small angle between successwe bonds. so that the direction of each 71¢ 097W flu, let/5449 bond is necessarily close to that of its predecessor. Despite this limitation. the vectors joining a mass element to the tenth follnwmg element are seen to be essentially randomly disposed. Two alternative allowed position! are shown (7V for the vector I; file Okra/{VJ- —. —— Md’é/tf? éx’fw/zjr) £55. W-Z‘a -Cflo{ (492%? M 6/. l 4.7%“, 1744' / eqofi, 4f Mass pomt 1 Fig. 9—5. Representation of the vectors used in relating the radius of gymtion to the end-to~end distance. A/‘fiz: Wig/Z:- MfWJKa' 4/ :. WK??? A/f: 1%12/ /-1rt 3/44 cozy-2.: 'jnafi»? j}: aw ' fl . 1 (MW / 49" 7447/4éaz— flzr/y / 0/112/ (’{Kf‘fiu-j 6 gf W/aa/z/ w! avg/m7/ yyaffm 2f ,4; ...
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This note was uploaded on 02/15/2010 for the course PHYSICS PHYSICS 17 taught by Professor Bustamante during the Spring '10 term at UCLA.

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Lecture5_Physics177_02Feb10 - 42.182 I00 SHEETS...

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