In TeXForm#
TeXForm parses this entry as a character leaf mapped to U+2329 (LEFT-POINTING ANGLE BRACKET).
\bbalpha\bbbeta\bbchi\bbdelta\bbDelta\bbdotlessi\bbdotlessj\bbepsilon\bbeta\bbgamma\bbGamma\bbLangle
\bbLangleSymbol
The 〈 symbol (Left-pointing angle bracket, U+2329), written as \bbLangle in LaTeX math mode.