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 ...
已浏览 79.7万 次2018年9月28日
Firefighting Videos
EPIC WATER BOMBER ACTION - CANADAIR CL-415 - FIREFIGHTING COMPILATION
14:56
EPIC WATER BOMBER ACTION - CANADAIR CL-415 - FIREFIGHTING COMPILATION
YouTubeEdoStuff Aviation
已浏览 140.1万 次2023年2月6日
A Day in the life of a Firefighter
13:27
A Day in the life of a Firefighter
YouTubeEugene Springfield Fire
已浏览 64.7万 次2024年2月24日
The Best Firefighting Planes in Action.
16:45
The Best Firefighting Planes in Action.
YouTubeMostop
已浏览 43.3万 次2024年1月25日
热门视频
6 Most Common Types of Organizational Structures (Pros & Cons) | From A Business Professor
16:46
6 Most Common Types of Organizational Structures (Pros & Cons) | From A Business Professor
YouTubeBusiness School 101
已浏览 50.3万 次2022年10月10日
Lewis Structures, Introduction, Formal Charge, Molecular Geometry, Resonance, Polar or Nonpolar
2:13:38
Lewis Structures, Introduction, Formal Charge, Molecular Geometry, Resonance, Polar or Nonpolar
YouTubeThe Organic Chemistry Tutor
已浏览 111.2万 次2016年10月30日
Chemistry - Atomic Structure - EXPLAINED!
11:45
Chemistry - Atomic Structure - EXPLAINED!
YouTubeThe Organic Chemistry Tutor
已浏览 68.1万 次2017年9月23日
Fire Prevention Tips
Campfire & River Night Ambience 10 Hours | Nature White Noise for Sleep, Studying or Relaxation
10:00:00
Campfire & River Night Ambience 10 Hours | Nature White Noise for Sleep, Studying or Relaxation
YouTubeRelaxing White Noise
已浏览 1158.8万 次2017年7月13日
🔥 Relaxing FIREPLACE (3 Hours) with Burning Logs and Crackling Fire Sounds for Stress Relief 4K UHD
3:00:01
🔥 Relaxing FIREPLACE (3 Hours) with Burning Logs and Crackling Fire Sounds for Stress Relief 4K UHD
YouTubeRoyal Fireplace 4K
已浏览 421.7万 次2022年12月28日
Fire Burning Hot Sparks Rising Background Free Video
0:16
Fire Burning Hot Sparks Rising Background Free Video
YouTubeFilterGrade
已浏览 63万 次2022年5月1日