Tobacco Mosaic
Virus
DISCOVERY - The scientific name of TMV is protovirus. It was first
discovered by D.J. Ivanowsky in 1892 and was later extraced in
crystalline form by W.M. Stanley in 1935.
SHAPE AND SIZE - It is a long cylindrical shape ribovirus. TMV
appears as a bunch of rods or needles under electron microscope. It
is measured about 30 nm in length and 18 nm in diameter.
, CONTENTS MOLECULAR WEIGHT
1 The molecular weight of TMV is 400000 dalton.
.
Structure
1. There are 49 capsomeres in
2 It is complex structure made up of
nucleoproteins.
per three turn of helix, and a
total of 2130 capsomers
constitute a complete protein
.
Type of nucleic acid
sheath of rod particles.
3 The nucleic acid is ss RNA , helically coiled
forming a central core of 8 nm. The naked RNA
. is capable of causing infection.
Proteins
4 The protein part makes the external
sheath of rod, called as capsid, which
. consists of helically arranged subunits
called as capsomeres (158 aa).
Virus
DISCOVERY - The scientific name of TMV is protovirus. It was first
discovered by D.J. Ivanowsky in 1892 and was later extraced in
crystalline form by W.M. Stanley in 1935.
SHAPE AND SIZE - It is a long cylindrical shape ribovirus. TMV
appears as a bunch of rods or needles under electron microscope. It
is measured about 30 nm in length and 18 nm in diameter.
, CONTENTS MOLECULAR WEIGHT
1 The molecular weight of TMV is 400000 dalton.
.
Structure
1. There are 49 capsomeres in
2 It is complex structure made up of
nucleoproteins.
per three turn of helix, and a
total of 2130 capsomers
constitute a complete protein
.
Type of nucleic acid
sheath of rod particles.
3 The nucleic acid is ss RNA , helically coiled
forming a central core of 8 nm. The naked RNA
. is capable of causing infection.
Proteins
4 The protein part makes the external
sheath of rod, called as capsid, which
. consists of helically arranged subunits
called as capsomeres (158 aa).
