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Alfalfa
Mosaic
Virus
-
AMV -
AMV
has
at
least
four
types
of
particles,
of
which
3
are
bacilliform
and
one
spheroidal.
All
the
components
are
made
up
of
the
same
coat
protein
(MW
24,800
daltons).
The
anisometric
particles
arc
probably
constructed
of
hexamer
tubes
and
terminated
by
icosahedral
halves.
The four types of particles are bottom (B), middle (M), top b, (Tb) and top a (Ta). The characteristics of these types are given below.
Particle type Sedimentation coefficient MW of RNA
Bottom(D) 24.35 1.3 x 106
Middle (M) 20.05 1.0 x 106
Top
b
(Tb) 17.35 0,7
x
106
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