recap

which amino acids are charged?+ what is their charge

NEGATIVE

• - Asp (D)

• Glu (E)

• -/uncharged Tyr (Y) depends on pka and pH

POSITIVE

• +Lys ( K)

• +Arg (R)

• + / uncharged His (H)

which amino acids are hydrophobic ?

• actually H PHOBIC

A- ala

V - val
L - leu
I -ile
M - met
F - phe
W - trp

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• kinda H phobic =

P = pro

Y = tyr
G- gly

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which amino acids are hydrophillic?

D - Asp

H - his

K - Lys

R - Arg
E - Glu
S - Ser
T - Thr

N - Asn

Q - Gln

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which amino acids are soft ligands ?

• neutral easy to polarise

• M- met

• H- his

• C- cys

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which amino acids are hard ?

• charged + difficult to polarise , mostly O and sometimes N

• S → Serine

• D → Aspartic acid

• N → Asparagine

• T → Threonine

• Y → Tyrosine

• E → Glutamic acid

• Q → Glutamine

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which metals are hard or soft?

hard = difficult to polarise,

• groups I and II

soft = easy to polarise,

• transition metals, higher groups, higher periods