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A beta hairpin is a common supersecondary motif composed of two anti-parallel beta strands connected by a loop. The structure resembles a hairpin and is often found in globular proteins. The loop between the beta strands can range anywhere from 2 to 16 residues. However, most loops contain less than seven residues. [2]
Functional leadership theory (Hackman & Walton, 1986; McGrath, 1962) is a theory for addressing specific leader behaviors expected to contribute to organizational or unit effectiveness. This theory argues that the leader's main job is to see that whatever is necessary to group needs is taken care of; thus, a leader can be said to have done ...
In reviewing the older leadership theories, Scouller highlighted certain limitations in relation to the development of a leader's skill and effectiveness: [3] Trait theory: As Stogdill (1948) [4] and Buchanan & Huczynski (1997) had previously pointed out, this approach has failed to develop a universally agreed list of leadership qualities and "successful leaders seem to defy classification ...
The original theory had already proposed moderators that act as substitutes and moderators that act as neutralizers. Howell and colleagues added enhancers to these. [12] Substitutes for leadership theory was a heavily researched area until the late 1980s when transformational leadership became the focus of the majority of leadership research. [13]
Situational Leadership Theory, now named the Situational Leadership Model, is a model created by Dr. Paul Hersey and Dr. Ken Blanchard, developed while working on the text book, Management of Organizational Behavior. [1] The theory was first introduced in 1969 as "Life Cycle Theory of Leadership". [2]
Consideration and initiating structure are two dimensions of leader behavior identified in 1945 as a result of the Ohio State Leadership Studies. Reviews of research on these dimensions are described in Stogdill's Handbook of leadership: A survey of theory and research and Littrell's Explicit leader behaviour .
The resulting structure is a key building block of many RNA secondary structures. Cruciform DNA Cruciform DNA is a form of non-B DNA that requires at least a 6 nucleotide sequence of inverted repeats to form a structure consisting of a stem, branch point and loop in the shape of a cruciform, stabilized by negative DNA supercoiling. [3]
In Forsyth, the leadership substitute theory is defined as "a conceptual analysis of the factors that combine to reduce or eliminate the need for a leader." [1] A leader may find that behaviors focusing on nurturing interpersonal relationships, or coordinating tasks and initiating structure, are not required in every situation. A study by Kerr ...