GEOMAG constructions: DNA double helix

DNA double helix

Or something similar. The horizontal sections would be base pairs, the yellow pentagons would be deoxyribose rings, and the green tetrahedra would be phosphate groups:

DNA double helix, version 2, view 1

1990 pieces: 512 balls, 1205 rods, 26 pentagons, 247 squares (10.59 kg)

DNA double helix, version 2, view 2

Each turn of the double helix is made of ten modules (nucleotid pairs). In the following table, we give the piece quantities required for several numbers of modules:


modules	balls	rods	pentagons	squares
5	192	445	10	95
6	232	540	12	114
7	272	635	14	133
8	312	730	16	152
9	352	825	18	171
10	392	920	20	190
11	432	1015	22	209
12	472	1110	24	228
13	512	1205	26	247
14	552	1300	28	266
15	592	1395	30	285
16	632	1490	32	304
17	672	1585	34	323
18	712	1680	36	342
19	752	1775	38	361
20	792	1870	40	380
...	...	...	...	...
n	40 × n – 8	95 × n – 30	2 × n	19 × n

DNA double helix, version 2, oblique top view

In this previous version each helix is of a different color and their chemical structure is not represented:

DNA double helix, version 1, view 1

1866 pieces: 462 balls, 1131 rods, 26 pentagons, 247 squares (9.82 kg)

DNA double helix, version 1, view 2

Required piece quantities:


modules	balls	rods	pentagons	squares
5	174	419	10	95
6	210	508	12	114
7	246	597	14	133
8	282	686	16	152
9	318	775	18	171
10	354	864	20	190
11	390	953	22	209
12	426	1042	24	228
13	462	1131	26	247
14	498	1220	28	266
15	534	1309	30	285
16	570	1398	32	304
17	606	1487	34	323
18	642	1576	36	342
19	678	1665	38	361
20	714	1754	40	380
...	...	...	...	...
n	36 × n – 6	89 × n – 26	2 × n	19 × n

DNA double helix, version 1, oblique top view

More helical structures in Helices.