S
l
o
w
p
o
i
n
t
e
d
e
n
d
d
i
s
a
s
s
e
m
b
l
y
f
r
o
m
m
a
n
y
c
a
p
p
e
d
f
i
l
a
m
e
n
t
s
N
u
c
l
e
o
t
i
d
e
e
x
c
h
a
n
g
e
F
a
s
t
b
a
r
b
e
d
e
n
d
a
s
s
e
m
b
l
y
o
f
f
e
w
u
n
c
a
p
p
e
d
f
i
l
a
m
e
n
t
s
a
n
d
C
a
p
p
i
n
g
Role
of capping proteins in
motility:
funneling
the treadmilling
