Component of the chloroplast ribosome (chloro-ribosome), a dedicated translation machinery responsible for the synthesis of chloroplast genome-encoded proteins, including proteins of the transcription and translation machinery and components of the photosynthetic apparatus. Component of the chloroplast large ribosomal subunit (LSU). Mature 70S chloroplast ribosomes of higher plants consist of a small (30S) and a large (50S) subunit. The 30S small subunit contains 1 molecule of ribosomal RNA (16S rRNA) and 24 different proteins. The 50S large subunit contains 3 rRNA molecules (23S, 5S and 4.5S rRNA) and 33 different proteins. L10 alpha form. Three forms, which differ in pI and possibly also in C-terminal length, are produced, L10 alpha, L10 beta and L10 gamma. Belongs to the universal ribosomal protein uL10 family.