In article <879457402.22840.0.nnrp-09.9e98d597 at news.demon.co.uk> "mark" <mark at busi-solgro.demon.co.uk> writes:
>as part of my wifes studies in biology she has been requested to give an
>account of the structure of proteins and using suitable examples explain how
>their structure enables them to carry out their function,showing relevant
>diagrams.
>mark at busi-solgro.demon.co.uk
Any recent Biochemistry textbook should be able to give a sufficient
level of information on exactly this. (Or at least have a few references
that also might prove helpful.)