Attunement is the act or process of attuning oneself, for example, to one's background.

reiki is the spiritual life force, and all spirits have the potential to radiate Good Light. DNA Activation is the release of your Light Body. So yes, its a part of reiki attunement.

Shigenori Nagatomo has written:

'Attunement through the body' -- subject(s): Body, Human (Philosophy), Comparative Philosophy, History, Mind and body, Philosophy, Comparative

Akhenaton. has written:

'Discussions of spiritual attunement & soul evolution' -- subject(s): Miscellanea, Spiritual life

'Loving touch' -- subject(s): Spiritual healing, Spiritual life

Probably not, throughout the attunements given in reiki one first reaches the first degree, then the second and finally the third. At the third attunement one is initiated into the master degree, not only does this mean one aquires the knowledge to give attunements, it also means the master reiki symbol is initiated within the body of the reiki master. This master symbol allows the practitioner the energy to be able to successfully attune new practitioners.