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. Author manuscript; available in PMC: 2024 Mar 11.
Published in final edited form as: J Mol Evol. 2021 Dec 29;90(1):30–43. doi: 10.1007/s00239-021-10039-9

Fig. 7. PKA phosphorylation of the N-terminal extension of lungfish cardiac TnI.

Fig. 7.

A, Coomassie blue-stained (left) and phosphoprotein Pro-Q Diamond stained (right) SDS-gels showed that treatment of lungfish cardiac muscle with β-adrenergic agonist isoproterenol (ISO) did not result in significant phosphorylation of cardiac TnI as compared with control (CON), indicating not fully evolved β-adrenergic responses. B, Coomassie blue-stained (left) and phosphoprotein Pro-Q Diamond stained (right) SDS-gels showed that PKA treatment of skinned lungfish cardiac muscle sections resulted in significant phosphorylation of cardiac TnI, suggesting an emerging capability of a responder to PKA regulation.