1. DNA STRUCTURE The DNA molecule consists of two multinuclear glycine strands that rotate around the same axis in a clockwise spiral. The main chain is a structure in which phosphoric (P) and deoxyribose (D) are arranged alternately.
2. Anti-parallel: Two glycine chains are antiparallel, with one chain running from one main direction in a ratio of 5 to 3 and the other chain in a ratio of 3 to 5. On the model you can see that there are 5 to 3 chains. The oxygen (0) of the upper deoxyribose points upwards, the other downwards. (P) is also in the opposite direction.
3. Structure details: the backbone consisting of monosaccharides is located on the outside of the , the base is on the inside, the deoxyribose is parallel to the axis of the and the base is essentially perpendicular to the axis.
Base pairs: The bases on the two strands form base pairs via oxygen , and the complementary relationships between the base pairs are A-T, G-C and A-T with three pairs of hydrogen . The red case on the model represents hydrogen .
5. Large and e Grooves: on the surface of the there are two obvious concave grooves, one large and deep and the other and flat. They are referred to as the main groove or secondary groove.

Technical data:
Item Type: DNA Structure Model
Material: plastic.
Model structure:
1. with diameter 10 A.
2. Pitch 18A, distance between adjacent base pairs 1.8A,
3. The alignment difference between adjacent bases is 360 degrees.
4. 6 base pairs per pitch
5. The length of the hydrogen is 1.0-2.5 Å.
Application: this product complies with the national standard JY35 81 created by of Education