Texts: The Tm (melting temperature) is defined as that temperature at which collagen is half-denatured and is used as a criterion for collagen stability. Tm measurements for collagen from rats and sea urchins are presented in the table. a) Assign each collagen to the proper organism. b) Explain the correlation between imino acid content (defined as the combined content of Pro and Hyp) and Tm. Collagen | Number of Hyp per 1000 residues | Number of Pro per 1000 residues | Tm -------- | ------------------------------ | ------------------------------ | -- A | 48.5 | 81.3 | 27.0 B | 68.5 | 111 | 38.5

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