Question

W wyniku hydrolizy pewnego dipeptydu, otrzymano aminokwasy - glicynę i aleinę o stosunku molowym 2:1. Napisz możliwe wzory tego peptydu i skrócone oznaczenia.

Answer 1

Gly-Gly-Ala

 

                    O                  O

                    ||                   ||

H2N-CH2-C-NH-CH2-C-NH-CH-COOH

                                                     |

                                                     CH3

Gly-Ala-Gly

 

 

                   O                O

                    ||                 ||

H2N-CH2-C-NH-CH-C-NH-CH2-COOH

                                |

                               CH3

 

 

Ala-Gly-Gly

 

 

                  O                 O

                  ||                   ||

H2N-CH-C-NH-CH2-C-NH-CH2-COOH

           |

          CH3

Answer 2

Jeżeli otrzymano glicynę i alaninę w stosunku 2 : 1 to:

Możliwe tripeptydy:

Gly-Gly-Ala --- NH₂-CH₂-CONH-CH₂-CONH-CH(CH₃)-COOH

Ala-Gly-Gly --- CH₃-CH(NH₂)-CONH-CH₂-CONH-CH₂-COOH

Gly-Ala-Gly --- NH₂-CH₂-CONH-CH(CH₃)-CONH-CH₂-COOH