TABLE 2.

Amino acid residues around (putative) SPase I cleavage sites^a

Position and residue	Frequency (% of total)
−3
A	60
V	18
I	6
S	5
G	5
T	3
L	2
F	1
Q	<1
M	<1
K	<1
Y	<1
W	<1
−2
S	18
F	11
K	10
E	8
L	8
Q	7
A	7
H	6
I	5
D	5
T	4
G	4
N	4
V	3
M	2
R	2
Y	2
W	1
−1
A	85
S	6
G	5
V	4
L	3
I	2
E	1
N	<1
+1
A	27
K	10
Q	10
S	8
V	5
F	5
D	4
N	4
Y	3
L	4
I	4
H	3
G	2
T	2
E	1
R	1
W	1
M	<1

^aThe frequency of a particular amino acid at each position is given as the percentage of the total number of predicted signal peptides in which it appears.