Protein Structure - Primary, Secondary, Tertiary, & Quarternary - Biology
5:22
YouTubeThe Organic Chemistry Tutor
Protein Structure - Primary, Secondary, Tertiary, & Quarternary - Biology
This biology video tutorial provides a basic introduction into the four levels of protein structure - primary, secondary, tertiary and quarternary structure. The primary structure of a protein is based on the sequence of amino acids. The secondary structure is based on localized shapes such as the alpha helix or the beta pleated sheet. The ...
799.4K viewsSep 28, 2018
Firefighters Battling Blazes
4.4K views · 99 reactions | Firefighters are still battling blazes at 11 locations on the outskirts of Jerusalem, the Fire and Rescue Service says in an update. Seven towns remain evacuated. 10 firefighting planes are taking part in the effort along with 119 firefighting teams, the statement says. Eight firefighting planes are slated to arrive today from Cyprus and Italy, the Fire Service adds. | Israel, One Nation | Facebook
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4.4K views · 99 reactions | Firefighters are still battling blazes at 11 locations on the outskirts of Jerusalem, the Fire and Rescue Service says in an update. Seven towns remain evacuated. 10 firefighting planes are taking part in the effort along with 119 firefighting teams, the statement says. Eight firefighting planes are slated to arrive today from Cyprus and Italy, the Fire Service adds. | Israel, One Nation | Facebook
FacebookIsrael, One Nation
1.2K views2 weeks ago
3K views · 18 reactions | Firefighters in Portugal are battling more than 100 blazes, prompting Prime Minister Luís Montenegro to declare a state of calamity. At least seven have died in the wildfires as of Wednesday. | Newsweek | Facebook
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3K views · 18 reactions | Firefighters in Portugal are battling more than 100 blazes, prompting Prime Minister Luís Montenegro to declare a state of calamity. At least seven have died in the wildfires as of Wednesday. | Newsweek | Facebook
FacebookNewsweek
1.1K views3 weeks ago
30K views · 786 reactions |  Firefighters are known for their...
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30K views · 786 reactions |  Firefighters are known for their...
FacebookChief Miller
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