in all confinement regimes.[]{data-label="fig:bond-ang-distSM"}](sfig5.pdf){width=".48\textwidth"}

Figure \[fig:bond-ang-distSM\], represents the segment-segment angle frequency distribution for all confining regimes. Figures \[fig:bond-ang-distSM\] (a-c) do not show any significant change in the angle distribution. In contrast, the strong confinement shows a drastic change in the distribution of the angle between the longer segments, Fig. \[fig:bond-ang-distSM\](d). The rest of the chains show similar behavior as weak confinement regime. The distribution for flexible chain is indeed the bond angle distribution and due to the purely repulsive interaction between every other monomer, they cannot approach each other closer than permitted length $\sigma$ (center to center distance which creates a equilateral triangle) beyond which they are repelled strongly. Therefore the angle distribution for flexible chain has a threshold around $\pi/3$. Figure \[fig:bond-ang-distSM\] also provides information about the alignment of the segments; the chains avoid very small or straight angles specially in weak confinement. The only exception is the behaviour of the longer segments under strong confinement where they can adopt parallel alignment, Fig. \[fig:bond-ang-distSM\](d).

segment orientation relative to radial unit vector 
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The orientation of the segments is calculated based on the cosine angle between the radial unit vector, ${\bf \hat {r}}=\frac{\bf r}{|\bf r|}$, and the vector which connects 