Xenobiotics- Heavy metal tolerance

Question 1

How are heavy metals release and effects

Answer 1

processing of metals
fossil fuel burning

contaminate, persist and bioaccumalate

Question 2

What are the methods of heavy metal tolerance

Answer 2

Hyperaccumalation
Inactivation of heavy metals
Active eflux transporters

Question 3

How can heavy metals be inactivated

Answer 3

Metallothiones- cysteine rich proteins that form s-s bonds in a non specific manner

Phytochelatins- oligomers of glutione
Heavy metal binding to gluthione makes it to form faster by enzymes

Question 4

How can heavy metals be inactivated

Answer 4

Metallothiones- cysteine rich proteins that form s-s bonds in a non specific manner

Phytochelatins- oligomers of glutione
Heavy metal binding to gluthione makes it to form faster

Question 5

Examples of how heavy metals be effluxed and influxed

Answer 5

copper efflux pump- pathway formed by 5 methoine pairs

Zinc transporter-Hzip
Histidine residues indicated for transport of zinc