The AMINO ACIDS Flashcards
(25 cards)
What’s the abbreviation (in order) for all 7 green Nonpolar amino acids?
Gavlipm
G
G
Glycine
Gly
–> Just a hydrogen.
no pKa.
A
A
Alanine
Ala
–> just a CH3
no pKa.
V
V
Valine
Val
–> CH3 with two CH3’s branching off, forming a Y shape.
no pKa.
L
L
Leucine
Leu
–>CH3, then another CH3, then CH with two CH3’s branching off.
So, like valine with one extra segment before the Y.
no pKa.
i
i
isoleucine
ile
–> same number of CH3’s as Leucine, but one part of the Y branch is moved down to the first segment.
{has stereochemistry}
no pKa.
P
P
Proline
Pro
–>This is the weird one that forms a pentagon on the centre carbon, with NH3 as the last corner (counting centre carbon as the first).
no pKa.
M
M
Methionine
Met
–> two CH3’s, then Sulfur, then one more CH3.
no pKa.
What’s the abbreviation (in order) for all 3 white Nonpolar AROMATIC amino acids?
FYW
(starting letters of their full names are: PTT)
F
F
Phenylalanine
Phe
–> A CH3, then a Phenyl ring.
(Called phenyl alanine because it’s like alanine plus a phenyl ring).
no pKa.
Y
Y
Tyrosine
Tyr
–> Ch3, then phenyl ring, then OH. So tyrosine is like phenylalanine plus an OH after the phenyl.
pKa = 10.5
Tyrosine is the only white (nonpolar aromatic) to have a pKa (which makes sense because it has an ionizeable OH).
W
W
Tryptophan
Trp
–> Ch3, then a pentagon with NH and a double bond (DIFFERENT than the one proline has.) and a regular phenyl attached to it.
no pKa.
What’s the abbreviation (in order) for all 5 YELLOW Polar amino acids?
SCTNQ
(the polar SCTNQ)
S
S
Serine
Ser
–> Just a CH3 then an OH.
no pKa.
C
C
Cystine
Cys
–> Just a Ch3 and then a SH (sulfur with hydrogen)
pKa = 8.4
(the only yellow polar SCTNQ animo acid with a charge)
T
T
Threonine
Thr
–>a CH3, then an OH, CH3 and H coming off. (THREE fingers off of the CH3).
{has stereochemistry}
N
N
Asparagine
Asn
–> CH3, then CH with an NH2 and a ketone =o (carbonyl bond).
no pKa.
Q
Q
Glutamine
Gln
–> Two CH3’s, then a CH with an NH2 and a ketone =o (carbonyl).
Just like Asparagine but with an extra CH3.
no pKa.
WHat is the What’s the acronym (in order) for the 3 Blue Positively charged Polar amino acids?
HKR
H
H
Histidine
His
–> A CH3, then a pentagon with double bond, N, double bond, NH.
pKa = 6.0
K
K
Lysine
Lys
–> 4 (four) CH3’s, then NH3+.
pKa = 10.5
R
R
Arginine
Arg
–> 3 (three) CH3’s, then NH, then CH with NH2 and =NH2+.
pKa = 12.5
What’s the abbreviation (in order) for the 2 Red Negatively charged Polar amino acids?
DE
(the two carboxylic acids. if you forget their chain, just remember they’re acids, so it must be a carb acid on the end.)
(they also have the same 4.0 pKa.)
D
D
Aspartic Acid
Asp
–> CH3, then CH with an O- and a =o carbonyl.
pKa = 4.0
