- The way in which these are joined together is shown in Figs.
- A given pair can be either way round.
- Adenine, for example, can occur on either chain ; but when it does, its partner on the other chain must always be thymine.
- This pairing is strongly supported by the recent analytical results, which show that for all sources of deoxyribonucleic acid examined the amount of adenine is close to the amount of thymine, and the amount of guanine close to the amount of cytosine, although the cross-ratio (the ratio of adenine to guanine) can vary from one source to another.
- Indeed, if the sequence of the bases on one chain is irregular, it is difficult to explain these analytical results except by the sort of pairing we have suggested.
- The way in which these are joined together is shown in Figs.- A given pair can be either way round.- Adenine, for example, can occur on either chain ; but when it does, its partner on the other chain must always be thymine.- This pairing is strongly supported by the recent analytical results, which show that for all sources of deoxyribonucleic acid examined the amount of adenine is close to the amount of thymine, and the amount of guanine close to the amount of cytosine, although the cross-ratio (the ratio of adenine to guanine) can vary from one source to another.- Indeed, if the sequence of the bases on one chain is irregular, it is difficult to explain these analytical results except by the sort of pairing we have suggested.
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