According to https://www.youtube.com/watch?v=KSKPgaSGSYA (created by one of the largest supermarket chains in the UK), different proteins have different roles in human body:
(Group 1) They’re like building blocks of you body, they help grow and repair your muscles, skin, hair, and nails.
(Group 2) They help protect you from getting ill by attacking germs of bacteria that might make you unwell.
(Group 3) They help you breathe by carrying oxygen around your body.
The following food is rich in proteins: meat (e.g. chicken, ham, beef), fish (e.g. salmon), eggs, tofu, lentils, beans, etc. but I couldn't find out which food is rich in which specific group of proteins, e.g. "eggs - Groups 1 & 3".