The models I like best are from Maruzen and are color-coded
to scale (1A = 1cm) and are handy building peptides and protein fragments
they sell several types of models like
1) ball and stick models (1A = 1cm)
2) ball and stick sterochemistry set (1A = 2cm)
3) HGS space filling models (1A = 1cm)
and other models including orbitals etc...
Maruzen Co., LTD.
PO Box 5050
FAX: TOKYO (03) 3274-2270
Phone: (03) 3278-9223
Telex: J26517 MARUZEN
krystek at bms.com