Table 1 Amino acid racemization and relative abundance in modern Phycis phycis (bold fields) and fossil P. tenuis (italic fields) otoliths.

From: First paleoproteome study of fossil fish otoliths and the pristine preservation of the biomineral crystal host

  

DL Asx

DL Gx

Amino acid pmol/mg

% Asx

% Glx

% Ser

% Ala

% Val

% Phe

% Ile

% Leu

Modern

FAA

0.252 (0.083)

0.167 (0.042)

90.7 (22.4)

20.4 (2.9

18.0 (2.0)

18.4 (3.8)

14.8 (2.1)

6.3 (2.2)

6.6 (1.8)

11.0 (3.7)

4.6 (1.8)

THAA

0.070 (0.001)

0.026 (0.001)

6518.32 (1696.3)

23.7 (0.3)

21.5 (0.5)

13.4 (0.2)

14.4 (0.2)

11.2 (0.6)

3.4 (0.2)

3.1 (0.1)

9.2 (0.2)

Fossil

FAA

0.843 (0.062)

1.006 (0.003)

1489 (430.7)

2.2 (0)

10.8 (0.6)

0.1 (0)

48.3 (0.2)

19.4 (0.1)

2.0 (0.2)

5.2 (0.4)

12.0 (0.2)

THAA

0.808 (0.052)

1.034 (0.006)

1117.9 (285.1)

1.6 (0.1)

28.5 (0.4)

0.4 (0.1)

37.6 (0.3)

15.5 (0.3)

1.4 (0.1)

4.0 (0)

11.0 (0.1)

  1. Note the decrease in % Asx and pmol THAA/mg starting otolith powder and increase in % Ala of fossil relative to modern otoliths. Average of replicates are shown with standard deviations in parentheses; technical duplicates of each from three modern and one fossil specimen were analyzed.
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