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A.C.A. da Costa
COH
H
I
I
H
C
I
N
COCH3
HO
C
H
I
H
C
OH
I
H
C
OH
I
CHpH
Fig. 5. N-acetylglucosamine molecule
COH
H
I
I
H
H
C
N
COCH3
I
I
ooc
C
0
C
H
I
I
CH3
H
C
OH
I
H
C
OH
I
CHzOH
Fig. 6. N-acetylmuramic acid molecule
C=O
I
NH
I
CH
co
I
NH
I
OC -
CH2
I
CH2
CH
COOH
NH
I
HOOC-C-{CI12)3 -
CH
co
I
NH
I
CH
COOH
Fig. 7. The tetrapeptide chain
considered, it is observed that carboxyl and amine groups can take part in metal
sorption processes. However, the whole structure of the peptidoglycan sheet is
based on the connection among all the structures previously presented. The