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DNA Structure - Biochemistry

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Condensed class notes for lectures about DNA structure and organization. Includes prokaryotic supercoiling and eukaryotic histone modification.

Instelling
Vak

Voorbeeld van de inhoud

Nucleic acids DrA Primary STRUCTURE

Structure PLaMary
Perose
Sugars
Neroxides Structure Are of Phosphate
PENTOSE And A BASE
composed
Sugor ,
,




RIS

Erig
THE RiBosE
In DIS TE PEMOSE WHEREAS
Simply PROSE WHEN NurB Carbons
M IS
DEOxyPROSE
Sugar
In


Sugar
iS I . ,




a
Sogan Adds 'To from
distinguish
One THEM THE CARBONS In THE BASE


pres
·
H

&
H
THE ATTACHED I' CARBON AND
-
SUGAR
IS MS
TO BASE AI HS TO S
PHOSPHATE
Ho -H Ho -H OH




.I
OH
Il
& · 5
5
2
- Al ITS S'CARBON 5: PO THE 3'-OH LAKED THE 5'-PO of An O
un is To
O




F
-
.




~
21
!I
~
I &
H H
primary H 4

It
4 I

Adjacen Meleotide To form The
Sugar-Phosphate Backbone .
It H H

Ho
C 13
[
· Ho
,
F

··
S. 8O
S3 of H

& > Primary Structure Ether Purme or pyridone
... "The Bases :
um RIBOSE DEOXYROSE
Ia
a
& ↳I- &
·




·
C SW
&
a
7

C5
-
BECAUSE SOME OFTHER
· THEY ARE CALLED BASES BE

NAROGENS
CAN

D
,




·
ARE ALL AROMATR
PROTONATED THEY .




Pure GtA Pyramidme Catar



2
- T · ⑨g
e "
-
· -
I I

Ed
--> Go THE PENTOSE FORMS A BOND




G
P - CONTENT WITH THE

g&
-
2 S8
·
·
.
- s
e 2 N


-C⑧C··
&
-
?g
O
T
--
· I


g)
-&-
- (

N34
- -




.
I 1No
,
D
⑨g
d⑳ &*
Called
B-glycoside Image
S S S Base a
S
·
W

- & C L I
2

- acce
S
S
-v
&




mer
-J 9


~
T -
7

- Nu Premes = Tac tu
-




Pyrmidmes = G +A




NICLEOIDE AOCEOSIDE : MCLEOSUdE BASE PHOSPHONESTER Bot Dra And Rea

LINKAGES
US A THE PHOSPHATE GROOPS ACT TO WNK
Only PHOSPHATE THE

SugarS
US

Sugar group
No : In
,




And PHOSPHATE WHEN S'end has

REFERRNey
A Microde HA BASE , A CLEOXIDE , A Adenosme BACKBONES THIS Bond is Called PhosphodresTER Because The free
Linkage
a

Sugar Group
A , ,
To = .
. a




C=
cytidine
(mgate)
G Gustnosme uridine and The 3 End has free 3-oh The Dread Rea
Phosphate group (neutral)
= U = a
, , .
,


5
8- &
BACKBONES ARE
I Asymmetric POWER
.

-




P O
DO
Parame
And PH (7 4) The
BASE DrABASES Parr A-L Acid AT pHospHATE of
Every necroside
PHOSPHATE
Physiological Group
C-G mit

Group
THE is An . .
,




O
Bonds G-cpars form Bonds
Hydrogen Hydrogen
HOW MOTHER ACROS

MAKING
THIS THER
VEGANE
3 is
DEPROTONATED I NAME


GO
.
IS
BASE
.
,



CH2
Whe A Parks form 2


Hydrogen
Bonds . THE H-Bonds
It H &
I
-H
BETWEEN ANT AND CaG ARE ALL
AppROXIMATEly
14 = DNA
SECONDARY STRUCTURE
S It
01 This MEANS THAT SECONDARY DIA STRANDS RUN
Equal MEASORg
:
, -2 9-3. . .


I
STRUCTURE BASE
STACKING
TWO
COMPLEMENTARY
-




P O
Wit Around form DOUBLE HELIX
SUGAR-PHOSPITALE
THE DISTANCE BETWEEN THE TWO
AnTipARALLEL To ONE ANOTHER & THE SAME Axis To A .
owE

O
BackBONES REMANS CONSTANT FEATURE THAT CONTRIBUTES THE ROTATHEN BASE BASES ARE HydropitoBra
STACKING
TO IS
BASE
CH2
BASE
Specifica
Parking
was first proposed
By Wayson
It H I And HydropHOBiC EFFECTS WORK TO MANIMATE CONTACT WINNER THE .
BASES ARE
sugHLy
Concluded
It H
offset due forces
↓ crick in 1953
By X-Ray DiffRACTron
THEY han der The
PHOSPHE Backbones Are Hydrophic
Sugar
, To WAALs . .




0 It
THAT THE DOUBLE HELICAL STRUCTURE IS POSSIBLE BECAUSE Due offSET of BASES HEL forms a da Maor
major
PARING
THE Dra DOUBLE
Groove
To THE
I ,


-




P O
oppose faces
specific Base of
The duplex
of THE
Complementary of Each THESE The Base

Groves
he
pares
on



graere
Two

paremy
·
.
or .




O
STRAND WHAT THE EXPOSED TO THOSE
S
PERMIS REPLICATION MAJORGROOVE ARE
THAN THE MMOR
SOLEM
MORE
GROTE
ON
BASE
CH2

It H I DNA Secondary Structure Forms of The double Helix : THE form of THE DOUBLE HELN


H HumidMy of THE
DEPENDMY
O ABSORBANCE THE RESOURCE EMPROMEN THE MORE Humid THE EmONMENT

Among
Pure WRRES THE
: On .
,




O It
forms of
The

Pyramide Acids hel handed.
Rigs
ABSorpyow The LOOSER The Dra Rich
Righ
Allows O . NorEic . not All Duplex Are in 1979,
S
H .
3


Extra ABSORBANCE AT J Th discovered Left HandEd HELICAL Dra
260 nm
PROPERTY
strong
= .
.




Stranded
distinguish
Allows us DOUBLE
SAGE
to BILW




This Is known as The A Bi Z
Dra .

HyperChromic Effect
. .




5?
10
.




10 RESidES
. 7 -
F
DOUBLE STRANDED DNA CAN BE SEPARATED W/HEAT .
[

PERTURN .

>
~
10 Resides 12 RESidES


=
-
-
PER TURN
-
-
- PER TURN
handed

F
THE TEMP WHICH Y Of ALL ArnotEd Its HAndEd
Rig
DreA A Lets
Righ
AT in
Sample is
-

-
- F
-


(smgle-stranded) PrcHA
Dematured Tm When The Drea Prch Prch
-


is 33 2 45 6
-

.
= 24 6
. - =
.
= .


-



1


F
-
- -




condem
-


is COOLED, M REANNEAls .
MOST COMMON E
most PH
A Bro




:
-




STACKED BASES ABSORB MORE

LIGH
THAN LISTACKED .



E
-
=
-
-

LEAT CONSENSED
-




Strands
ABSORBANCES
Quenched WHEN reared -




concentBicest
innurousmarit
F

Also BE Devoured read
-
9
By
Removing
DNA CAN wa

ignoi rbackBand
no SALT A-1 Pict frast
Hrg h
t

Regros
. Mele .
saly




Long Sequences
STABME Dut .

Geschreven voor

Instelling
Studie
Vak

Documentinformatie

Geüpload op
18 januari 2024
Aantal pagina's
3
Geschreven in
2023/2024
Type
College aantekeningen
Docent(en)
Dustin king
Bevat
Class 10 to 11

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