Figure 5: Mass spectra detail of NHMUK R4249 (sample with banded fibres), NHMUK R4493 (sample with 67 nm banded fibres) and NHMUK R12562 cement.
From: Fibres and cellular structures preserved in 75-million–year-old dinosaur specimens
(a, d and g) Peaks are associated with glycine fragments. (b, e and h) Peaks are related to alanine fragments. (c, f and i) Peaks are related to proline fragments.
