DKC1 primary-source locators

These are authored source notes, separate from the immutable publication caches. They distinguish independently inspected originals from cache availability. They are not additional experimental observations.

A short original-only anchor for the direct pair is “Recombinant pontin bound recombinant MBP-dyskerin” (PMID:18358808, Results describing Figure 5E). This quote is kept here because the normal publication cache is abstract-only. The full paragraph distinguishes purified bacterial proteins from the preceding rabbit-reticulocyte association experiment.