Méthodes d'étude des macromolécules Flashcards

1
Q

UV lointain

A

100 nm - 250nm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

UV proche

A

250 nm - 400 nm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Spectre Visible

A

400 nm - 800 nm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Infrarouge proche

A

800 nm - 2000 nm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Infrarouge moyen

A

2k nm - 16k nm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Infrarouge lointain

A

> 16k nm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Environnement du fluorophore plus apolaire (hydrophobe)

A

Blue shift

(ex : coeur hydrophobe de protéine)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Environnement du fluorophore plus polaire (hydropohile)

A

Red shift

(ex : eau)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Si fluorophore figé dans la protéine

A

Restitution d’energie importante sous forme de fluorescence

IF >> chaleur

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Si fluorophore libre dans la protéine

A

Restitution d’energie sous forme de chaleur préférentiellement

IF << Chaleur

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Dichroïsme circulaire

A

= Déviation des composantes circulaires d’une onde polarisée

θ = valeur d’éllipticité molaire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Dichroïsme Circulaire - Structures Secondaires

Hélice α

A

UV lointain (180 - 240 nm)

  • 195 nm : θ positif et >>0
  • à 208 nm et 222 nm : θ négatif et <<0
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Dicroïsme circulaire - Structures Secondaires

Feuillet β

A

UV lointain (180 nm - 240 nm)

  • 195 nm : θ positif mais >0
  • Entre 205 et 220 nm : θ négatif mais <0
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Dichoïsme circulaire - Structures Secondaires

Random Coil

A

UV lointain (180 nm - 240 nm)

  • Autour de 195 nm : θ grandement négatif puis oscille autour de 0 quand λ augmente
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Dichroïsme circulaire - Structures Tertiaires

A

UV proche (250 nm - 320 nm)

  • 250-270 -> Phe impliqué
  • 270-290 -> Tyr impliqué
  • 280-300 -> Trp impliqué

Sans structure tertiaire : signal proche de 0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly